Electronic protection relays

Electronic relays for protection of 3-phase electrical motors and compressors

Model	...	Export price
JVRD-380	...	*
XJ3-G	...	*

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JVRD-380

The relay is used to protect 3-phase compressors and electrical motors from failures in the power supply. The relay is activated upon an exchange of phases in the 3-phase power supply, or a fault in one of the phases, or if the voltage across the separate phases becomes disbalanced, or if the power supply drops or spikes outside of the allowed parameters. The status of the electrical power suply is signalized via 5 LED's.

Technical parameters

3-phase working voltage: 380V, 50Hz

Relay current rating: 6А

XJ3-G

Is used for protection of 3-phase compressors and electrical motors from failures in the power supply. It switches off if there is a phase sequence error, a phase failure, or a voltage imbalance in the power line of 10% or more between the 3 phases, or if the power line voltage drops 10% or more.

Technical parameters

3-phase working voltage: 380V, 50Hz

Relay current rating: 3А

Voltage relay series VPD-1 for protection of monophase systems, for DIN rail mounting

Model	...	Export price
VPD1-63	...	*
VPD1-63 (LED)	...	*
VPD1-100	...	*

* Minimum order quantity conditions apply.

* You may click on product's model name in order to open an separate, more detailed page with its parameters.

Description

The relays VPD1-63 (LED), VPD1-63 and VPD1-100 protect monophase appliances from failures in the power supply. They switch off the appliance in case of a decrease or a peak in the mains power supply, or if it is interrupted. After switching off the appliance, the relay does not switch it back on until 3 minutes have elapsed from the dropout and 30 seconds have elapsed since the recovery. This protects the appliance from any possible peaks in the power supply upon its restart and allows for the balancing of the pressure in refrigeration systems.

VPD1-63
Input monophase power supply: 220V (min 175-max 270 V)
Grid voltage, at which the relay switches off the appliance: <175V or >270V
Reaction time of the relay upon a power supply failure: <1 sec
Relay power-on time upon restoration of the power supply: utpo 60 sec
Maximum switching current of the relay's contacts: 63А
Built-in digital voltmeter for grid voltage: no

VPD1-63 (LED)
Input monophase power supply: 220V (min 175-max 270 V)
Grid voltage, at which the relay switches off the appliance: <175V or >270V
Reaction time of the relay upon a power supply failure: <1 sec
Relay power-on time upon restoration of the power supply: utpo 60 sec
Maximum switching current of the relay's contacts: 63А
Built-in digital voltmeter for grid voltage: yes

VPD1-100
Input monophase power supply: 220V (min 175-max 270 V)
Grid voltage, at which the relay switches off the appliance: <175V or >270V
Reaction time of the relay upon a power supply failure: <1 sec
Relay power-on time upon restoration of the power supply: upto 60 sec
Maximum switching current of the relay's contacts: 100А
Built-in digital voltmeter for grid voltage: no

Electronic relay JD-5B for complex protection of 3-phase compressors and motors

Model	...	Export price
JD-5B	...	*

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Description

JD-5B simultaneously provides overcurrent protection for compressors and electrical motors, as well as three-phase protection against faults in the power supply. It is activated by a phase drop, a voltage drop of the three-phase power supply, or by an overloading (overcurrent) of the compressor. The relay uses a patented algorithm for linear sampling of the consumed current of the compressor with automatic adjustment of the operating mode. The operating current of the compressor is set by a potentiometer.

Technical parameters

3-phase working voltage: 380V, 50Hz

Relay current rating: 2А

Electronic relay FRIDGEGUARD for protection of appliances and electronic equipment

Model	...	Export price
Fridgeguard	...	*

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Description

The relay Fridgeguard is used to protect refrigerators, freezers, air-conditioners and electronic equipment from power supply failures. The relay switches off the appliance if the power supply becomes lower or higher than the permitted thresholds, or if it stops. After the relay has switched off, the appliance will not be turned on again until 90 seconds have elapsed since the restoration of the power supply. This protects the appliance from any peaks upon restart of the power supply and allows for the balancing of the pressure in refrigeration systems.

Technical parameters

Input monophase power supply: 220V, 50Hz
Mains spike response time: <10 nsec
Spike protection: 160J
Mains spike discharge current: 6.5 kA
Relay current rating: 10 А