RELAYS Solar energy systems - Fujitsu Global COMPONENTS CONTENTS Fujitsu solar relays for a sunny future Page 1 RELAY PRODUCT LINE UP - SOLAR ENERGY SYSTEMS FTR-J2 Page 2 FTR-K2W Page

Fujitsu relays for solar applicationsDC voltage versions - AC voltage versions - Latching versions

RELAYSSolar energysystems

FUJITSU COMPONENTSCONTENTS

Fujitsu solar relays for a sunny future Page 1

RELAY PRODUCT LINE UP - SOLAR ENERGY SYSTEMS

FTR-J2 Page 2FTR-K2W Page 3

FTR-F4G Page 4

FTR-K2G Page 5

FTR-K3-WG Page 6

PRODUCT LINE-UP

FTR-K3-PV Page 7

FTR-K3-WS & FTR-K3-PS Page 8

FTR-K3 latching relays Page 9

Specification overview Page 10

Solar energy system - relay integration Page 15

Contact details Page 16

Page 1 of 16 Fujitsu Components Relay Product Line-upSolar Energy Systems

RELAY LINE-UP SOLAR ENERGY SYSTEMS

Solar energy systemsRelays

Fujitsu Components recognizes the value and importance of protecting the global environment and strives to contribute to the creation of a sustainable environment for future generations.

Not only does Fujitsu endeavours to reduce the environmental impact of the products throughout the product lifecycle, but also designs its products for integration in environment improving appliances. Fujitsu Components’ product range contains power relays that are highly recommended to be used in solar energy systems.

With its current relay product range Fujitsu Components Europe has the opportunity to provide multiple solutions for solar energy systems. Fujitsu’s solar relays have two target functions within the solar converter. The DC relays, to switch the DC voltage generated by the solar panel, and the AC relays with big contact gap, to switch the generated electricity to the power grid to provide the necessary safety “circuit-break-function”.

This guide gives an overview of Fujitsu’s relay product line up applicable for solar energy systems and its key features.

Fujitsu solar relays for a sunny future


RELAY LINE-UP DC POWER RELAYS - FTR-J2

FTR-J2Ultra small high voltage DC relay

The FTR-J2 is one of Fujitsu’s DC relays suitable to be integrated in the solar converter to switch the DC voltage and current generated by the solar panel.

Despite the fact that the FTR-J2 relay dimensions are relatively small, (the relay measures just 24mm (L) x 23.5mm (W) x 27mm (H)), the FTR-J2 relay is capable of switching 450VDC/10A. To be able to switch high DC voltages in these small dimensions, Fujitsu has designed two strong permanent magnets in the relay. This magnetic provision is installed to safely extinguish the severe breaking arc occuring when breaking high DC currents. The FTR-J2 is the powerful, compact and reliable solution for solar appliances that need to switch high DC voltage and current.

The FTR-J2 is a 2 Form A relay that can be used in two different configurations. It can be used in a circuit configuration switching 2x200VDC and in a configuration switching 1x450VDC.

The FTR-J2 can handle an inrush current of 150A (capacitive load). It offers high insulation between contacts and coil with an insulation distance of clearance/creepage > 6mm, a dielectric strength of 4,000VAC and 10,000V surge strength.

Application examples• Solar systems • Battery powered equipment• UPS • Wireless base stations• Fuel Cells


RELAY LINE-UPDC POWER RELAYS - FTR-K2W

FTR-K2WDC relay with 2x3.2 mm contact gap

The special feature of the FTR-K2W DC relay is its big contact gap. This double contact relay is designed with a total contact gap of > 6mm.

The FTR-K2W enables remote switching and emergency cut-off of the solar panel. The relay is capable of switching 60V DC, 30A. The high insulation that the FTR-K2W offers, is shown in the relay’s insulation clearance >8.0mm/creepage >9.5mm, the 5,000VAC dielectric strength and the surge strength of 5,000VAC.

Like the FTR-J2, the FTR-K2W can be integrated in the solar converter to cut off/pass the DC current. The very big contact gap and powerful switching capabilities classify this relay among the safest DC power relays.

Application examples• Solar converters/panels • Battery powered equipment• Base stations (Wimax) • UPS


RELAY LINE-UPAC POWER RELAYS - FTR-F4G

FTR-F4GRelay with 1.5mm contact gap

After introducing Fujitsu’s DC power relay line-up focused on solar energy systems, the coming five pages will highlight the AC relays. These AC relays within Fujitsu’s product line-up are recommended to be integrated in the solar converter as a switch to safely disconnect the inverter from the power grid. Fujitsu offers single side stable and latching type versions.

First in line is the FTR-F4G, its main special feature is the contact gap of 1.5mm. According to the DIN safety standard VDE 0126-1-1the circuit break function between the solar converter and the power grid must have a contact gap ≥ 1.5mm at each pole. For systems that provide full galvanic isolation; two relay contacts are needed.

The FTR-F4G has a 2 form A contact configuration. Its switching capability of 250VAC, 5A makes the relay most suitable for the solar energy system type with low power requirements. The relay contact has TV3 inrush capability.

Application examples• Solar power system/inverters • Power generation systems• UPS • Home appliances• Office equipment


RELAY LINE-UPAC POWER RELAYS - FTR-K2G

FTR-K2GPower relay with wide contact gap

Fujitsu present the FTR-K2G. The relay has a contact separation of more than 3mm which provides a safe power switching between the main power lines and the equipment providing full disconnection.

The insulation distance between coil and contacts with a creepage of >8mm offers reinforced insulation. The FTR-K2G features a 1 form A contact and is capable of switching 5000VA with a max switching voltage of 440VAC. The relay has a high contact capacity of 20A. This powerful relay is recommended for the larger solar panel systems. Further more the FTR-K2G has a contact with TV8 inrush capability. The coil voltage ranges from 5 to 100VDC with a dissipation of 1W. The FTR-K2G relay has been designed based on the need of protection against hazards such as electrical, mechanical, thermal and fire of appliances when operated (complies with IEC 60335-1).

Application examples• Photovoltaic inverters • Washing machines• Tumble dryers • Home entertainment systems• Saunas • Industrial power supplies• Copiers (inter lock circuit)


RELAY LINE-UPAC POWER RELAYS - FTR-K3-WG

FTR-K3-WGFTR-K3 relay with wide contact gap

Fujitsu FTR-K3-WG features a wide contact gap of 1.5mm. With this contact gap the relay complies with the DIN standard VDE 0126-1-1 for integration in solar energy appliances.

The FTR-K3-WG is highly recommended to be part of the inverter function as a switch between the converter and the power grid. Compared to the early mentioned FTR-F4G relay, the FTR-K3-WG has a higher contact rating; 25A, 250VAC. Because of its high power the relay is recommended for the larger solar inverter systems.

The FTR-K3-WG can handle a carry current of 25A. It offers high insulation between contacts and coil with an insulation distance of clearance > 6.5mm/ creepage > 9.5mm, a dielectric strength of 5,000VAC and 8,500V surge strength.

Application examples• Solar energy systems • Printers• Copy machines • OA machines• Power supply • Inter-lock functions (IEC60950-1 .1.0mm contact gap)


The FTR-K3-PV can classify itself among the Fujitsu relays that are suitable for integration in solar energy systems. This AC power relay stands out through its high contact current of 32A.

Same as the FTR-K3-WG “solar relay” the -PV version of this series has a contact gap of 1.5mm (complying with the DIN standard VDE 0126-1-1 for integration in solar energy systems). The surge strength between coil and contacts of this relay is 6,000V. The dielectric strength between open contacts is 2,500V/1 min. and 4,000V/1 min. between coil and contacts.

The relay has a coil power consumption of 1,200mW. The coil holding voltage of the FTR-K3-PV can be reduced to 45% of the nominal coil voltage (ambient temp. +85 °C, contact current 32A). The coil holding voltage contributes to energy saving of the application when using PWM coil drive.

Application examples• Solar energy systems • Printers • Smart meters • Power supply • Copy machines

RELAY LINE-UPAC POWER RELAYS - FTR-K3-PV

FTR-K3-PV32A high contact current relay


RELAY LINE-UPAC POWER RELAYS- FTR-K3-WS/FTR-K3-PS

FTR-K3-WS & FTR-K3-PS1.8mm contact gap relays

Through continued research and development Fujitsu keeps expanding its product range. Fujitsu listens to the needs and requirements of the market, together with its wealth of knowledge and experience Fujitsu knows how to develop solutions accordingly to today’s solar market requirements.

As an answer to the solar market requirement for a 1.8mm contact gap relay to comply with the IEC 62109-2 standard*, Fujitsu developed the FTR-K3-WS and FTR-K3-PS relays.

• FTR-K3-WSThis high capacity 25A relay has a special feature with a contact gap of 1.8mm (complies with IEC62109-2*). The relay provide a low coil power consumption of 1,200mW and offers a mechanical life of min. 100k operations.

• FTR-K3-PSThis relay is also equipped with a contact gap of 1.8mm. Beside this wide contact that complies with the IEC62109-2* for integration in solar energy systems provides the FTR-K3-PS a contact current of 32A (coil power is 1,400mW).

Page 13 of this booklet shows more specifications of the FTR-K3-WS and FTR-K3-PS.

* IEC62109-2:Per the IEC62109-2 table 12 of part I, the impulse transient over voltage withstand rating for a relay switching the AC side of a 1000Vdc PV is 4464V. This means a clearance of 3.58mm air gap is necessary. For fail safe reasons, it is necessary to divide the air gap between 2 similar relays providing a total air gap of 3.58mm.


RELAY LINE-UP AC POWER LATCHING RELAYS

In an answer to the market demand for latching relays, Fujitsu released several new types. The FTR-K3 series have been expanded with two latching versions suitable for solar energy systems, in order to save energy.

• FTR-K3L-PV: The earlier mentioned FTR-K3-PV relay is now available as a dual coil latching version. The relay offers a 32A high contact current and has a contact gap of 1.5mm.

• FTR-K3L-WG: Also the FTR-K3-WG is now available in a dual coil latching version. This 1.5mm contact gap relay has a contact rating of 25A/250VAC and can handle a carry current up to 30A.

Both relays feature a big contact gap which qualify them to be suitable for solar energy applications according the DIN safety standard VDE 0126-1-1.

Latching relays offer low power consumption and low heat generation. An energy saving latching relay is cost efficient and at the same time eco-friendly.

Application examples• Solar power system/inverters • Power generation systems• UPS • Home appliances• Office equipment

FTR-K3 LATCHING RELAYSEco-friendly & energy saving relays


RELAY LINE-UPSPECIFICATION

Item

Series nameDC

FTR-J2 FTR-K2W

Contact ArrangementGapRating (NO)Rating (NC)Continuous currentMax. switching voltage

70% of nominal 70% of nominal 65% of nominal

Max. switching powerNominal powerCoilNominal voltageOperate voltageAmbient temperatureMechanicalLifeElectrical (at rating)

Insulation (at 500Vdc)Dielectricstrength

Open contactsAdjacent contactsCoil - contacts

PC board layout

Dimensions mm (WxLxH)

1 form A 2 form A 1 form A2.0mm 1.0mm 6.0mm10A / 450VDC 10A / 200VDC 30A / 60VDC- - -12A 12A 30A450VDC 200VDC 72VDC4,500W 2,000W 1,800W1.06W 0.53W 2.00W5 ... 110V 5 ... 110V 5 ... 48V

-40 - +85°C -40 - +85°C -40 - +70°C2,000,000 ops. 2,000,000 ops. 1,000,000 ops.10,000 ops. 10,000 ops. 10,000 ops.1,000Mohm 1,000Mohm 1,000Mohm1,000VAC 1,000VAC 2,000VAC- 1,000VAC -4,000VAC 4,000VAC 5,000VAC

24.0x23.5x27.0 34.9x36.5x30.2



Item

Series nameAC

FTR-F4G FTR-K2G


75% of nominal 65% of nominal




PC board layout


2 form A 1 form A1.5mm 3.0mm5A / 250VAC 20A / 250VAC- -5A 25A400VAC 400VAC1,250VA 5,000VAC0.80W 1.10W5 ... 48V 5 ... 110V

-40 - +70°C -40 - +70°C500,000 ops. 1,000,000 ops.100,000 ops. 100,000 ops.1,000Mohm 1,000Mohm1,000VAC 2,000VAC3,000VAC -5,000VAC 5,000VAC

35.0x16.0x28.028.7x12.7x25.2



* 1 Coil holding voltage when 40 to 80% of nominal coil voltage is applied.* 2 Coil holding voltage when 45 to 80% of nominal coil voltage is applied.

Item

Series nameAC

FTR-K3-WG FTR-K3-PV






PC board layout


1 form A 1 form A1.5mm 1.5mm25A / 250VAC 32A / 250VAC- -25A 32A250VAC 250VAC6,250VAC 8,000VA0.78W 1.20W5 ... 48V 5 ... 48V

-40 - +85°C * 1 -40 - +85°C * 2

2,000,000 ops. 1,000,000 ops.100,000 ops. 30,000 ops.1,000Mohm 1,000Mohm2,500VAC 2,500VAC- -5,000VAC 4,000VAC

30.1x15.7x23.330.1x15.7x23.3



Item

Series nameAC

FTR-K3-WS FTR-K3-PS






PC board layout


1 form A 1 form A1.8mm 1.8mm25A / 250VAC 32A / 250VAC- -25A 32A250VAC 250VAC8,000VA 8,000VA1,200mW 1,400mW5 ... 48V 5 ... 48V

-40 - +85°C -40 - +85°C 100,000 ops. 100,000 ops.30,000 ops. 30,000 ops.1,000Mohm 1,000Mohm2,500VAC 2,500VAC- -5,000VAC 4,000VAC

30.1x15.7x23.330.1x15.7x23.3



Item

Series nameAC

FTR-K3L-WG FTR-K3L-PV






PC board layout


1 form A 1 form A1.5mm 1.5mm25A / 250VAC 32A / 250VAC- -25A 32A250VAC 250VAC6,250VA 8,000VA0.9W 1.20W5 ... 24V 5 ... 24V

-40 - +85°C -40 - +85°C 1,000,000 ops. 1,000,000 ops.100,000 ops. 30,000 ops.1,000Mohm 1,000Mohm2,500VAC 2,500VAC- -5,000VAC 4,000VAC

30.1x15.7x23.330.1x15.7x23.3

Latching relays


RELAY LINE-UP SOLAR SYSTEM RELAY APPLICATION

SOLAR ENERGY SYSTEMIntegration of Fujitsu relays

Photovoltaic inverter

Micro-inverter


RELAY LINE-UP CONTACT DETAILS

More informationContact details

Over the years Fujitsu Components has made its name on the component and device market with a complete product line-up adapted to the requirements of the market. Fujitsu Components’ product experts have built a wealth of knowledge through their years of experience. They are pleased to share their knowledge and offer technical support.

Would you like to know more about Fujitsu relays suitable for solar energy systems?Contact Fujitsu via telephone at +31 (0)23 556 0910 or by email [email protected].

Visit emea.fujitsu.com/components to download relay datasheets.

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RELAYS Solar energy systems - Fujitsu Global COMPONENTS CONTENTS Fujitsu solar relays for a sunny future Page 1 RELAY PRODUCT LINE UP - SOLAR ENERGY SYSTEMS FTR-J2 Page 2 FTR-K2W Page