Lodam Compressor Protection Modules

Technical manualVersion 3.0

SE-B1, B2, B3, B4

Page 2

Contents1. Read this first . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.1. Reading instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.2. User manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.3. Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2. General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3. Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

4. How to . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

5. Funtions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

6. Examples of application use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

6.1. Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

7. Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

8. Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

9. Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

10. Trouble shooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

11. Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

12. Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Technical manual SE-B1, SE-B2, SE-B3, SE-B4

Page 3

Page 4

1. Read this firstThe contents of this manual are subject to change without

notice. Lodam electronics holds the copyright to this user’s

manual. The user shall follow any instructions given in this

user manual entirely and not only partly. Any non-follow-

ing of this user manual result in exclusion of all warranties,

guarantees, and liabilities. Copyright© 2014 by Lodam

electronics a/s. All Rights Reserved.

Disposing of the parts of the controller:

INFORMATION FOR USERS ON THE

CORRECT HANDLING OF WASTE ELECTRI-

CAL AND ELECTRONIC EQUIPMENT (WEEE)

In reference to European Union directive 2002/96/

EC issued on 27 January 2003 and the related national

legislation, please note that:

1. WEEE cannot be disposed of as municipal waste and

such waste must be collected and disposed of sepa-

rately;

2. The public or private waste collection systems defined

by local legislation must be used. In addition, the equip-

ment can be returned to the distributor at the end of its

working life when buying new

equipment;

3. The equipment may contain hazardous substances:

the improper use or incorrect disposal of such may

have negative effects on human health and on the

environment;

4. The symbol (crossed-out wheeled bin) shown on the

product or on the packaging and on the instruction

sheet indicates that the equipment has been intro-

duced onto the market after 13 August 2005 and that it

must be disposed of separately;

5. In the event of illegal disposal of electrical and elec-

tronic waste, the penalties are specified by local waste

disposal legislation.

1.1. Reading instructionsThe following symbols are used to draw the reader’s

attention to different warning levels.

Important information.

Danger!! General danger.

Danger of electrical current or voltage.

1.2. User manualBefore installation the user should be thoroughly

familiarized with this user manual, especially with

purposes, installation and operation.

Special care should be taken when installing and connect-

ing external equipment (PTC sensor, high voltage etc) and

handling the modules correctly according to protection

against ESD.

Installation of the SE-B1/SE-B2/SE-B3/SE-B4

must be performed by authorized personnel only.

All warranties are excluded in case installation is

performed by unauthorized personnel or in case the

SE-B1/SE-B2/SE-B3/SE-B4 has not been correctly

installed.

1.3. SafetyThe SE-B1/SE-B2/SE-B3/SE-B4 is a protection

device and not a safety component according to

the Machinery Directive and can not be used in

“medical” or “life support” equipment.

Before plant commissioning the service technician shall

ensure that personal safety requirements are met in

conformity with the Machinery Directive on the basis of

safety estimations.

Electrical plant failures are to be immediately

solved, even though no immediate danger exists;

the SE-B1/SE-B2/SE-B3/SE-B4 and motor must

be without power.

Technical manual SE-B1, SE-B2, SE-B3, SE-B4

Page 5

2. GeneralThe protection devices SE-B1, SE-B2, SE-B3 and SE-B4.

Hereafter SE-Bxare used for protection of the motor

against overheating by monitoring motor temperature by

means of PTC-sensors mounted in the motors windings.

Further, other temperatures can be monitored by for

example mounting PTC-sensors in the discharge outlet

of a compressor, for monitoring the oil temperature or the

temperature in vessels.

In other areas where PTC-sensors are installed, they can

also be monitored by a SE-Bx protection module. Due to

their fast reaction time, good accuracy and built-in relay

they can be a good solution instead of a separate control-

ler. They can also be used as switch relays.

A SE-Bx is default wired up for lockout in case of an

overheat situation, but can also be used as a thermostat/

switch relay via the cool down period of the media sur-

rounding the PTC-sensor.

3. Definitions

Product range

Definitions

HW Hardware/electronics

NC Normally Closed (relay)

NO Normally Open (relay)

PTC Positive Temperature Coefficient (sensor element)

SE-Bx A SE-B1, SE-B2, SE-B3 or SE-B4 compressor protection module

Page 6

4. How toUse the SE-Bx in lockout mode

SE-B1/SE-B2/SE-B3

SE-B4

The wire jumper is default mounted in the two unnamed

terminals – located between terminals N and 12. In this

mode a fault condition will need a manual reset to release

the relay.

Use the SE-Bx in restart / hysteresis mode

SE-B1/SE-B2/SE-B3

SE-B4

The wire jumper between the two unnamed terminals is

removed.

After an overheat condition, the relay is energized again as

soon as the resistance is below the lower threshold level of

2.7 kOhm. There is no timer function in the SE-Bx.

Technical manual SE-B1, SE-B2, SE-B3, SE-B4

Page 7

5. FuntionsThe SE-Bx is a motor protection module. By monitoring

the resistance in a PTC sensor, it will open its relay when

the resistance of the PTC sensor increases above the limit

as shown below.

The PTC-sensor could for example be according to DIN

44081/82. The resistance of these PTC-sensors are not

linear, but gives a steep rise in resistance when the thresh-

old temperature of the PTC-sensor is reached. This is

detected by the protective device and the relay is released

and thereby cutting the control power as shown on the

diagram below.

RPTC

(PTC resistance)

Close relay

Closed

Open

Safety chain (NC)

12 11 14

12 11 14

Open relay

2,7kΩ 4,5kΩ

Relay

RPTC

(PTC resistance)

Not Lockout

Closed

Open

Safety chain (NC)

12 11 14

12 11 14

Lockout open relay

Lockout

2,7kΩ 4,5kΩ

Relay Since the increase in resistance is so steep, from 1 up to 9

PTC-sensors can be coupled in series without raising the

actual temperature threshold more than a few degrees

Celsius.

Default there is a restart blocking wire jumper to prevent

a motor from being started too soon after having been

overheated. A manual reset must be done by removing

power from the module for minimum 5 seconds and then

applying it again.

If the restart blocking wire jumper is removed, the relay

behaves like on the following diagram.

RPTC

(PTC resistance)

Close relay

Closed

Open

Safety chain (NC)

12 11 14

12 11 14

Open relay

2,7kΩ 4,5kΩ

Relay

RPTC

(PTC resistance)

Not Lockout

Closed

Open

Safety chain (NC)

12 11 14

12 11 14

Lockout open relay

Lockout

2,7kΩ 4,5kΩ

Relay

In this mode, there is a hysterese from 2,7kOhm to 4,5

kOhm. When the resistance in the PTC-sensors increases

above 4,5 kOhm, the relay is released. The relay is released

as long as the resistance is above 2,7 kOhm. When the

resistance comes below 2,7 kOhm, the relay is energized.

This hysteresis can be used for applications where the

media where the PTC-sensors are mounted has such a

large temperature inertia that this hysteresis is sufficient.

Page 8

6. Examples of application use

6.1. Connections

Terminal Description

L Power supply

N Neutral

11 Relay common

12 Relay NO – Error condition

14 Relay NC – Ok condition

Unnamed Lockout wire jumper

Compressor protection module with a direct starting

compressor

Method 1:

1918

1716

1514

1312

1110

98

76

54

32

1

L1 L2 L3 N PE

F11 0

Q1

F2 K1 11

F13

9

1U1

1W1

1V1

M1

M3

R1-

3

F34A

01

S1

L

1 2

11B

1B

2S

E-B

1S

E-B

2S

E-B

3S

E-B

4N

1214

R7

4 3

H1

F13

3

L N

T2

S0/

220

H2

K1 11

P>

F5 P<

F6 B1

K2T

18 K1 3/3/

3/12

/16

/17

18/1

9

F4K

1 11K

1 11K

1 11K

1 11

B2

Y2

Y3

K2T

R8

F12

4A

11

Ple

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Option

Technical manual SE-B1, SE-B2, SE-B3, SE-B4

Page 9

Method 2:

1918

1716

1514

1312

1110

98

76

54

32

1

L1 L2 L3 N PE

F11 0

Q1

F2 K1 11

F13

9

1U1

1W1

1V1

M1

M3

R1.

.3

F34A

01

S1

L

12

11B

1B

2S

E-B

1S

E-B

2S

E-B

3S

E-B

4N

1214

R7

4 3

F13

3

H2

P>

F5

P<

F6

B1

K2T

18 K1 3/3/

3/10

/16 18

/19

K1 11

K1 11

K1 11

B2

Y2

Y3

K2T

R8

F12

4A

11P

leas

ese

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tails

rega

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tion

insi

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albo

x

Option

S2

H1

K3

F4

Red

Bro

wn

Ora

nge

Bla

ck

K1 11

K3

9

11 13

K3

9Compressor protection module with a part winding

compressor.

Method 1:

1918

1716

1514

1312

1110

98

76

54

32

1

L1 L2 L3 N PE

F11 0

Q1

F2 K1 11

F13

9

1U1

1W1

1V1

M1

M3

R1.

.6

F34A

01

S1

L

12

11B

1B

2S

E-B

1S

E-B

2S

E-B

3S

E-B

4N

1214

R7

H1

3/3/

3/10

/15

/16/

18/1

9

K1

11 R8

F12

4A

11P

leas

ese

ede

tails

rega

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nnec

tion

insi

deth

ete

rmin

albo

x

K2 14

F14

9

2W1

2U1

2V1

145/

5/5/

17m

ax0.

5se

c

S2

F13

3

H2

P>

F5

P<

F6

B1

K2T

18 K1

K1 11

K1 11

B2

Y2

Y3

K2T

Option

K3

Red

Bro

wn

Ora

nge

Bla

ck

K1 11

K3

9K

39

F14

5

F4

K2 14

K1T

11 13

K1T

12 K2

15

Y1K

214 K1 11

Page 10

Method 2:

1918

1716

1514

1312

1110

98

76

54

32

1

L1 L2 L3 N PE

F11 0

Q1

F2 K1 11

F13

9

1U1

1W1

1V1

M1

M3

R1-

6

F34A

01

S1

L

1 2

11B

1B

2S

E-B

1S

E-B

2S

E-B

3S

E-B

4N

1214

R7

4 3

H1

F14

5

L N

T2

S0/

220

K1 11

P>

F5 P<

F6 B1

K2T

18 K1 3/3/

3/12

/16

/18

/19

F4K

111

K2

12K

111

K1

11

B2

Y2

Y3

K2T

R8

F12

4A

11

Ple

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Option

K2 12

F14

9

2W1

2U1

2V1

F13

3

H2

K2

Y1

K1T

K1T

13K

212

5/5/

5/17

12m

ax0.

5se

c

Technical manual SE-B1, SE-B2, SE-B3, SE-B4

Page 11

Oil flow monitoring using the SE-B1/SE-B2/SE-B3/SE-B4

module:

13121110987654321

L1L2L3NPE

F1 10 Q1

F2

K19

F139

M1

M3

L 11 B1 B2

SE-B1SE-B2

N 12 14

H2

2/2/2/11/1213/16/17/1918/20/25

4/4/4/1624

S2

K2

5/5/5/10

12

F3 4A

0 1S1

K311

K29

11

12 14F7

123

789

L1

L2

L3

F8

H1

F132

K1T13

K312

K1

K29

K110

K110

K110

K312

K29

K3

2 - 3 s

K1T

P>F5

P<F6

K4T20

K5T22

9/13/18/25 9

K3T19

)( C1+

F9

R7

14

Page 12

Using the C1 electrolytic capacitor together with an addi-

tional time delay K3T will allow a temporary bridging of

the monitoring function.

Please note: The C1 electrolytic capacitor will be destroyed

if mounted with wrong polarity! Measure the polarity off

the two leads and connect the C1 according to the draw-

ing.

Legend for the schematic diagrams

B1/B2 Control unit

C1 Electrolytic capacitor

F1 Main fuse

F2 Compressor fuse

F3 Control circuit fuse

F4 Differential oil pressure switch

F5 High pressure limiter

F6 Low pressure limiter

F7 Control circuit switch

F8 Phase sequence control relay

F9 Oil flow switch

F12 Fuse for the crank case heater

F13/F14 Thermal motor overload relay

H1 Signal light “Over temperature”

H2 Signal light “Oil pressure/flow fault”

K1/K2/K3 Motor contactors

K1T Time relay for part winding operation 2-3 s

K2T Time relay Start-up delay

K3T Time relay oil flow monitoring 10-20 s

K4T Time relay pause time 300 s

K5T Time relay oil level monitoring 120 s

M1 Compressor

Q1 Main switch

R1..3 PTC sensors in motor windings

R1..6 PTC sensors in part winding motor windings

R7 PTC sensor in cylinder head/discharge gas temperature sensor

R8 Crank case heater

S1 Control switch

Y1 Solenoid valve (Start unloading)

Y2 Solenoid valve (Liquid line)

Y3 Solenoid valve (Capacity control – Expansion valve)

Technical manual SE-B1, SE-B2, SE-B3, SE-B4

Page 13

7. Technical data

Technical specifications

Description SE-B1 SE-B2 SE-B3 SE-B4

Supply voltage 230 VAC; +10% ~-15%, 50/60 Hz 2VA 24 VAC; +10% ~ -15%, 50/60 Hz 2VA 24 VDC; +20% ~ -20%, 50/60 Hz 1W 24 VDC version: no galvanic isolation

115 - 230 VAC; +10% ~ -15% 50/60 Hz 2VA

230 VAC; +10% ~ -15%, 50/60 Hz, 2VA 24 VAC; +10% ~ -15%, 50/60 Hz, 2VA

Permitted ambient temper-ature

-30°C – +70°C -30°C – +60°C

Relative humidity Max. 95% RH non-condensing Electronic circuit board is coated

Air pressure 660 hPA to 1060 hPA

PTC sensor cable length 120 mm 350 mm

Relay 24 VAC/VDC versions Switch voltage 24 VAC/VDC Continuous current max 10 mA (gold plated contacts). If current limit is exceeded, gold plating will be destroyed and current limit is then like the other versions listed below All versions Switch voltage 250 VAC. Continuous current max 2.5A Switching capacity 300 VA, C300 (pilot type use according to UL508)

Fuse required Max. 4A, fast-blow

Enclosure class Terminals IP00

Field wiring markings Wire type (Cu only, 14 – 20 AWG) Use 60°C copper conductors only

Terminal torque rating 6 lb-in.” / 0.7 Nm or equivalent Spade connection 6.3 mm * 0.8 mm / 1/4”

Type of sensor PTC according to DIN 44081/44082

Number of sensors 1 to 9 in series

Max total resistance, R25 total < 1.8 kΩ

RTrig 4.5 kΩ ±5%

RReset 2.7 kΩ ±5%

Reset Interrupt supply power for min. 5 seconds

Weight 150g; 24 VDC version: 90g

Dimensions 68.3 mm (w) * 32.5 mm (d) * 50 mm (h)

Mounting 35 mm snap-in or mounting with screws

Housing material PA66 - GF

UL file number E334756

Terminal wire range Cu 60°C only. 20-14 AWG / 0.5 mm2 - 2,0 mm2

Page 14

8. Drawings

29,2

1

32,5

1

68,3 ±1

55,5 ±0,5

10,0

±0,5 50

,0±1

Shown without wire

SE-B1/SE-B2/SE-B3

4,5

7

2,5

10

33

±0,5

3

,5

68 + 10

55,5 ±0,5

50

±0,5

SE-B4

Mounting is for standard rail 35 mm according to DIN EN

60715.

Technical manual SE-B1, SE-B2, SE-B3, SE-B4

Page 15

9. StandardsThe product is manufactured according to the following

standards.• RoHS 2002/95/EC

• Low voltage 206/95/EC

• 61010-1 Safety requirement for electrical equipment for measurement and control

• EMC 2004/108/EC

• 61000-6-x Generic EMC

The following standards have been used• EN 61010-1

Safety requirement for electrical equipment for meas-urement and control

• EN 61000-6-1

Immunity for domicil, profession and light industry

• EN 61000-6-3 Emission for domicil, profession and light industry

• UL 508 UL file number E334756

10. Trouble shootingCheck if there is power to the unit according to

specification.

If the power is ok:

• Turn off the power for 5 seconds and see if the relay is

energized after power on again.

If not, turn off all the power to avoid risk of injury!

• Unmount one of the cables to the PTC element in the motor

• If the measured resistance is above 4.5 kΩ ±5%, the temperature of the PTC-sensor is above the threshold limit and the relay has been released to protect the motor or installation.

• If the measured resistance is more than 1 MΩ, there is a brokenconnection to the PTC-sensor and the relay will not be engaged.

• If the measured resistance is close to 0 Ω, there is a short circuit on the PTC-sensor cables and there is no overheat protection!

• If power and resistance is ok, the protection module may

be defect and needs replacement.

Page 16

11. IndexA

Application use 8

D

Definitions 5

Dimensions 13

Direct starting compressor 8

Drawings 14

E

Enclosure class 13

F

Field wiring markings 13

Function 7

Fuse required 13

H

Housing material 13

L

Lockout mode 6

M

Max total resistance 13

Mounting 13, 14

N

Number of sensors 13

O

Oil flow monitoring 11

Operation voltage 13

P

Part winding compressor 9

Permitted ambient temperature 13

PTC sensor cable length 13

R

Relay 13

Reset 13

Restart / hysteresis mode 6

S

Schematic diagrams 12

Sensor type 13

Standards 15

T

Technical data 13

Terminal torque rating 13

Trouble shooting 15

W

Weight 13

Technical manual SE-B1, SE-B2, SE-B3, SE-B4

Page 17

12. Notes

Innovative and energy saving climate controlWhen it comes to climate control Lodam is one of the most experienced you can turn to. For more than four decades we have developed, produced and implemented electronic solutions dedicated to optimising applications like:

• Compressors• Condensing units• Heat pumps• Air conditioning• Refrigerated truck and trailer• Reefer containers

We know the importance of reliable, energy-efficient operation – and constantly push techno-logical boundaries to bring you the most innovative and forward-thinking solutions.

As part of the BITZER Group we are backed by one of the world’s leading players in the refrigeration and air conditioning industry. This alliance provides us with extensive network and application knowhow and allows us to stay at the forefront of climate control innovation. And to help ensure comfortable surroundings for humans and reliable protection of valuable goods anywhere in the world.

Lodam electronics a/sKærvej 776400 SønderborgDenmark

Tel. +45 7342 3737Fax +45 7342 3730lodam@lodam.com

For more information visit:

www.lodam.com

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