Beta Monitoring-ETB1 13 1

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BETA MonitoringMonitoring of Electrical Values

Product overview

13/2 Siemens ET B1 2008

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Overview

Devices Page Application Standards Usage

Non-resid

ential

buildings

Residential

buildings

Industry

Voltage relays 13/3 Monitoring the voltage of emergencylighting in public buildings, short-timefailures of 20 ms, for ensuring operationalparameters for devices or systemcomponents or monitoring the neutralconductor for breaks.

IEC 60255;DIN VDE 0435-303;DIN VDE 0108;DIN VDE 0435;DIN VDE 0633

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Current relays 13/11 Monitoring of emergency and signallighting and motors.

All current relays can be overloadedconnected either with direct measurementor through transformers.

IEC 60255;DIN VDE 0435-303

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Priority switches 13/17 For reduction of the connection fee inaccordance with German FederalRegulations on Tariffs when used in sys-tems with electric storage heaterswhere the continuous-flow heaters areswitched with priority.

IEC 60669 (VDE 0632);BTO 6 Section 4

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Fuse monitors 13/18 Monitoring of all types of low-voltage

fuses.Can be used in asymmetric systemsafflicted with harmonics and regenerativefeedback motors.

IEC 60255;

DIN VDE 0435

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Phase and phase sequencemonitors

13/20 For the visual signaling of phase failuresor phase sequences in 3-phase systems.

The phase sequence is arbitrary.The device is also suitable for 1, 2 or3-phase operation.

IEC 60255;DIN VDE 0435

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Insulation monitorsfor industrial applications

13/22 We recommend the use of insulationmonitors in all systems without grounding.

Adjustable alarm value 2 to 100 kandelectrical isolation of measuring circuit,power supply and contact voltage.

IEC 60255;IEC 61557

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Insulation monitorsfor medical premises

13/25 For the insulation monitoring of IT systemsor load current monitoring of IT systemtransformers for inadmissible overheating.

The response value is 50 to 500 kandis adjustable.

EN 61557-8IEC 61557-8DIN VDE 0100-710IEC 60364-7-710

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5TT3 407 5TT3 408 5TT3 410

Standards IEC 60255; DIN VDE 0435-110

Rated control voltage Uc V AC 230/400

Operating range (overload capability) Uc 1.1 1.35 1.2

Rated frequency Hz 50/60

Back-up fuse terminals L1/L2/L3 A 2

Response values overvoltage:OFF-switching Uc -- 0.9 ... 1.3 --ON-switching -- 4 % hysteresis --

undervoltage:OFF-switching Uc 0.8 0.7 ... 1.1 --ON-switching 0.85 4 % hysteresis --

Minimum contact load V; mA 10; 100

Phase asymmetry setting accuracy % Approx. 5 ... 10

repeat accuracy % 1

Phase failure detection at L1, L2 or L3 ms 20 100 --

OFF delay s -- 0.1 ... 20 --

Automatic reclosing delay s 0.2 ... 20 -- --

Rated insulation voltage Ui between coil/contact kV 4

Contacts contact (AC-11) A 3 1 4

Electrical isolation creepage distances andclearancescontact/contact mm -- 4 --actuator/contact mm 4 5.5

Rated impulse withstand voltage Uimp actuator/contact kV > 4

Rated operational power Ps AC operation:230 V and p.f. = 1 VA 2000 -- --230 V and p.f. = 0.4 VA 1250 -- --

DC operation:Ue= 24 V and Ie= 6 A W Max. 100 -- --Ue= 60 V and Ie= 1 A W Max. 100 -- --Ue= 110 V and Ie= 0.6 A W Max. 100 -- --Ue= 220 V and Ie= 0.5 A W Max. 100 -- --

Terminals screw (Pozidriv) 1

Conductor cross-sections Rigid, max. mm2 2 2.5 Flexible, with end sleeve, min. mm2 0.5

Permissible ambient temperature C -20 ... +60

Humidity class acc. to IEC 60068-2-30 F


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Selection and ordering data

Contacts Ue Ie Uc MW DT Order No. Priceper PU

PG PU PS*/ P. unit

Weightper P. unitapprox

V AC A V AC Unit(s) Unit(s) kg

Overvoltage relaysFor the monitoring of 1, 2 or 3 phases against N,with reverse voltage and phase failure detectionSwitching thresholds:0.9 ... 1.3 x Uc, 4 % hysteresis, adjustable

2 CO 230 4 230/400 2 B 5TT3 194 027 1 1 0.150

For the monitoring of 3 phases against N,with asymmetry, reverse voltage andphase failure detection,with N-conductor monitoringSwitching thresholds:0.9 ... 1.3 x Uc , 4 % hysteresis, adjustable

2 CO 230 4 230/400 2 B 5TT3 195 027 1 1 0.150

Undervoltage relays

For the monitoring of 1, 2 or 3 phases against N,with phase failure detectionSwitching thresholds: 0.7 and 0.9 x Uc, not adjustable

1 CO 230 4 230/400 1 } 5TT3 400 027 1 1 0.065

For the monitoring of safety light devices of 1, 2 or3 phases against N, with phase failure detectionSwitching thresholds:0.85 and 0.95 x Uc, not adjustable

1 CO 230 4 230/400 1 } 5TT3 401 027 1 1 0.065

For the monitoring of 1, 2 or 3 phases against N,with phase failure detectionSwitching thresholds:0.7 and 0.9 x Uc, not adjustable

2 CO 230 4 230/400 2 } 5TT3 402 027 1 1 0.110

For the monitoring of 1, 2 or 3 phases against N,with phase failure detectionSwitching thresholds:0.9 ... 0.95 x Uc, 5 % hysteresis, adjustable

2 CO 230 4 230/400 2 A 5TT3 403 027 1 1 0.110

For the monitoring of 3 phases against N,with asymmetry, reverse voltage andphase failure detection, with N-conductor monitoringSwitching thresholds:0.7 and 0.9 x Uc, not adjustable

2 CO 230 4 230/400 2 B 5TT3 404 027 1 1 0.110

For the monitoring of safety light devices of 3-phasesagainst N, with asymmetry, reverse voltage andphase failure detection, with N-conductor monitoringSwitching thresholds:0.85 and 0.95 x Uc, not adjustable

2 CO 230 4 230/400 2 B 5TT3 405 027 1 1 0.110

For the monitoring of medical premises of 3 phasesagainst N, with asymmetry, reverse voltage andphase failure detection, with N-conductor monitoringSwitching thresholds:0.7 ... 0.95 x Uc, 5 % hysteresis, adjustable

2 CO 230 4 230/400 2 B 5TT3 406 027 1 1 0.110


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Characteristic curves

Contacts Ue Ie Uc MW DT Order No. Priceper PU

PG PU PS*/ P. unit

Weightper P. unitapprox

V AC A V AC Unit(s) Unit(s) kg

Short-time relays

For the monitoring of short-time failure detection20 ms of 1, 2 or 3 phases against N,with phase failure detection andN-conductor monitoringSwitching thresholds:0.8 ... 0.85 x Uc, not adjustable

2 CO 230 4 230/400 2 B 5TT3 407 027 1 1 0.110

Under and overvoltage relays

For the monitoring of 3 phases against N,with asymmetry, reverse voltage and phase failuredetection, with N-conductor monitoring and adjust-able time delay of 0.1 ... 20 sSwitching thresholds:Undervoltage: 0.7 ... 1.1 x Uc, 4 % hysteresis, adjustableOvervoltage: 0.9 ... 1.3 x Uc, 4 % hysteresis, adjustable

2 CO 230 4 230/400 2 B 5TT3 408 027 1 1 0.110

N-conductor monitors

With asymmetry detection and N-conductor monitoring

2 CO 230 4 230/400 2 B 5TT3 410 027 1 1 0.110

Timing interval of5TT3 400 - 5TT3 406 undervoltage relays

Timing interval of5TT3 410 N-conductor monitors

I2

_07033b

A

11-14

11-12

L1, L2, L3

t

U

NU

N

I2_07516a

PEN conductorinterruption

A


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Dimensional drawings

5TT3 1 and 5TT3 4 voltage relays

5TT3 410 N-conductor monitors

Timing interval of5TT3 407 short-time relays

Timing interval of5TT3 408 under/overvoltage relays

tv: adjustable automatic reclosing delay 0.2 to 20 s t: adjustable OFF delay 0.1 to 20 s

The undervoltage relay switches at a phase asymmetry of approx.6 to 8 %, regardless of the response values for undervoltage.The above diagram shows the timing interval for undervoltage orasymmetry.

The undervoltage relay switches at a phase asymmetry of approx.6 to 8 %, regardless of the response values for undervoltage.The above diagram shows the timing interval for undervoltage.

I2_07271b

11-1411-12

UN

tv tv

tv tv

"RESET""RESET"T0

11-1411-12

0

A

Response time

Good-signal Good-signal

Good-signal Good-signal

without faultstorage

with faultstorage

Response time

I2_07270b

11-1411-12

on

t

UH

U

off

on

off

on

off

>U


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Schematics

Switching example for5TT3 195, 5TT3 40 voltage relays

1, 2, 3-phase operation against N

5TT3 1945TT3 195

5TT3 4025TT3 4035TT3 4045TT3 405

5TT3 4065TT3 4075TT3 4085TT3 410

5TT3 4005TT3 401

Switching example for5TT3 401, 5TT3 403, 5TT3 405 undervoltage relays

Application of the undervoltage relay is in accordance withDIN VDE 0108, which stipulates switching to a safety power supplyafter a fault. Buildings are distinguished according to use, such asbusiness premises, exhibition areas or guest houses. These are allcovered generically as rooms/buildings where "people meet".

There is a fault if the voltage of the general power supply drops for0.5 seconds > 15 % in relation to the rated voltage (i.e. 195 V at 230 V).

In this case, depending on the type of use of the building, the lightingmust be switched to a safety power supply after 0.5 to 15 s.A safety power supply may be: battery system, generating set or aquick-starting standby generating set.

14 12 22

11 21I2_

07594a L1 L2 L3 N

NL1

One-phase operation

A

14 12 24 22

11 21I2_

07595a

L1 L2 L3 N

Two-phase operation

14 12 24 22

11 21I2_

07596a L1 L2 L3 N

L1 L3L2 N

Three-phase operation

A

14 1224 22

11 21

L1' L2' L3'N'

I2_

07272b

L1 L2 L3 L4

K2

L1 L2 L3 N

K1

K1 K2

3x AC 230 V

A

Emergencylighting

Standardlighting

Emergencypower supply

Standardpower supply


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Switching example for5TT3 404, 5TT3 405, 5TT3 406, 5TT3 408 undervoltage relays

Switching example for5TT3 407 short-time relay

These voltage relays can only be used for 3-phase operation. As wellas monitoring undervoltages and overvoltages in accordance withtheir description, they also monitor reverse voltage, asymmetry andN-conductor breaks.

In the case of sensitive technical sequences, it is often not possibleto tell whether this interrupt has interfered with the process sequence.The switch disconnects the power supply, which can then be switchedback by using the reset pushbutton.

I2_07273b

L1 L2 L3 N

L1 L2 L3 N

K1

14 122422

11 21

M

PE

Phase failure

A

Switching example for5TT3 407 short-time relay

In simple cases, it may be sufficient that a short-time interrupt isregistered without the need to disconnect the power supply. In thecase of a short-time interrupt, this is counted by the pulse counter.The pulse counter can be reset if required.

Switching example of5TT3 410 N-conductor monitors

3 230 V AC

L1

5TT3 410

L2 L3

N

K1

L1

L2

L3

N

PE

F1

F2

F3

S1 F4 F5 F6

11

14

K1I2_07517a

Test andserviceswitch

A


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More information

General voltage monitoring

For general device and plant protection, voltage relays with switchingthresholds of 0.7 x Uc, i.e. 161 V are used. If they have fixed,non-adjustable switching thresholds, they switch back to normaloperation at 0.85 Uc, 195 V or at 0.9 x Uc, 207 V, depending on theversion. If they have adjustable threshold values, they switch back tonormal operation with 4 % hysteresis, 9 V.

1, 2 or 3 phases against N or 3 phases against N

All voltage relays require an N-conductor. Devices for 1, 2 or 3 phasesagainst N can be used for 1, 2, or 3-phase operation. Devices for3 phases against N require all three phases, whereby the sequencein which they are connected is irrelevant.

Asymmetry detection

If different voltages occur in a 3-phase network, this is called phaseasymmetry. Some voltage relays detect an asymmetry of approx. 6to 8 % of the phase-to-neutral voltage, i.e. approx. 14 to 16 V andswitch off. This type of operation is used to protect motors against a"skew" (for example).

N-conductor monitoring

An N-conductor break causes a "skew", depending on the phaseload. In extreme cases, this could cause 380 V to be applied to aphase and destroy the connected devices. Each voltage relay withasymmetry detection is tripped by an N-conductor break, if the

phase displacement is at least 14 to 18 V.The 5TT3 410 N-conductor monitor detects a phase displacement of5 %, which is roughly 12 V. This provides earlier protection againstovervoltage for connected devices. The N-conductor monitor doesnot react if the voltage drops or rises in all phases simultaneously;or if a phase is swapped with the N-conductor.

Reverse voltage detection

If a phase fails, the motors feed a reverse voltage to the missingphase. However, voltage relays with reverse voltage detection willdisconnect in this case because they are monitoring the phase angle.

Phase failure detection

If a phase fails completely, the voltage relays disconnect with adelay as specified in the technical specifications.

Short-time failure detection

Short-time failures upwards of 20 ms cannot be detected withconventional voltage relays. However, they can occur in the case ofsystem transfers or lightning strikes and can lead to uncertainty for

sensitive process sequences or measuring procedures.The 5TT3 407 short-time voltage relay has a reset function thatallows a procedure to be permanently interrupted after a fault.

Back-up fuse

The voltage relays do not require a series fuse as device protection.However, they are often installed in junctions, i.e. in main supplysystems with high fusing. In this case, the supply lead to the voltagerelay must be short-circuit resistant. The series fuse only serves asline protection.

Monitoring of safety light devices

DIN VDE 0108 requires that buildings/rooms where "people meet"have emergency lighting. Depending on what the rooms are usedfor, the emergency lighting must be switched on after 0.5 to 15 s ifthe voltage falls 15 % below the rated voltage of 230 V, i.e. 195 V.This switching threshold must not be adjustable. The voltage relaysfor safety light devices react after 150 ms. At 5 % undervoltage, i.e.

at 218 V, they switch back to normal operation.

Monitoring of medical premises according to DIN VDE 0100-710

In the case of undervoltage, there is no guarantee that medicalequipment will continue to function. Because of the risk this presentsto patients, e.g. during operations, it is essential that systems switchto an emergency power supply in the event of undervoltage.

5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3 5TT3194 195 400 401 402 403 404 405 406 407 408 410

Overvoltage -- -- -- -- -- -- -- -- --

Undervoltage -- -- --

Monitoring of safety light devices -- -- -- -- -- -- -- -- -- --Monitoring of medical premises -- -- -- -- -- -- -- -- -- -- --

Monitoring of N-conductor -- -- -- -- -- -- -- -- -- -- --

Monitoring of short-time interruptions -- -- -- -- -- -- -- -- -- -- --

1, 2, 3-phase against N -- -- -- -- -- --

3 phases against N -- -- -- -- -- -- --

Asymmetry detection -- -- -- -- -- --

N-conductor monitoring -- -- -- --

Reverse voltage detection -- -- -- -- -- -- --

Short-time failure detection -- -- -- -- -- -- -- -- -- -- --

Phase failure detection --

Switching thresholds: -- -- -- -- -- -- -- -- -- -- -- --

0.7 / 0.9 x Uc, not adjustable -- -- -- -- -- -- -- -- --

0.8 / 0.85 x Uc, not adjustable -- -- -- -- -- -- -- -- -- -- --

0.85 / 0.95 x Uc, not adjustable -- -- -- -- -- -- -- -- --0.7 ... 0.95 x Uc, 5 % hysteresis, adjustable -- -- -- -- -- -- -- -- -- -- --

0.7 ... 1.1 x Uc, 4 % hysteresis, adjustable -- -- -- -- -- -- -- -- -- -- --

0.9 ... 1.3 x Uc, 4 % hysteresis, adjustable -- -- -- -- -- -- -- -- --

Adjustable time delay -- -- -- -- -- -- -- -- -- -- --

Contact: 1 CO -- -- -- -- -- -- -- -- -- --

Contact: 2 CO -- --

Documents

Beta Monitoring-ETB1 13 1