ABB G3HC HENF327935R0005 Relay Interface Module

G3HC HENF327935R0005 Relay Interface Module

The G3HC HENF327935R0005 is a relay interface module, it establishes the link with the protection relay. Each NSD 70D can have a maximum of 6 interfaces of either type. Each interface contains the transmitting and receiving circuits for one command and a common alarm output. An auxiliary command output is associated with each main output and can be used, for example, for controlling an event recorder. All input and output circuits are potentially-free and DC isolated.

Relay interface 1 type G3HC contains the DC isolated input and output circuits for communication with the protection. The input circuits can be set for the two voltage ranges 48 VDC to 110 VDC (switches at approx.25 V) and 125 VDC to 250 VDC (switches at approx. 70 V). A correct transmission signal always comprises two anti-valent criteria, the TX_GUARD signal and the PTX tripping signal. This enables the processor on the DSP module G3HP to detect any failure of a single component (e.g. opto coupler short-circuit or mal-operation of an IC) and give alarm and thus prevent the transmission of an incorrect tripping signal.

Similarly, two anti-valent criteria are necessary when a tripping signal is being received, one of which is the discontinuation of the guard signal RX_GUARD, the other being the presence of a correct tripping signalPRX.Providing both conditions are fulfilled, the semiconductor interface (RX TRIP) and the auxiliary relay(AUX) are activated and the corresponding output contact closes. A timer with settings of 5, 20 or 100 ms for prolonging the command ensures a steady output signal, even if there are short interruptions of the signal being received. To maintain the security of the unit in the event of the failure of a single component, the receiver channel also includes a single component failure monitor. This picks up if only one of the criteria is fulfilled for longer than 3 seconds and blocks the main and auxiliary command outputs until a permissible relationship between the criteria is re-established.

To protect the auxiliary contact from damage due to excessively high making currents or capacitive cable discharge currents, there is a resistor mounted on soldering posts in series with the contact. The main out put is equipped with an over voltage and reverse polarity protection and an internal current limiter.

Alarms originating from the various monitors are signal led by the red LED "AL" on the front plate which is the common alarm for the assembly and relaved via the connection COMMON ALARM to the DSP module. An auxiliary alarm relay, which can be selected to have either a N/O or N/C contact and has an adjustable pick-up time, signals the common alarm externally. A common alarm can also be signaled originating from other modules to the relais interface. Even though the relais interface has no fault on itself.

Received or transmitted commands are signal led by separate green LED's.

Technical Specifications

100% brand new and original,All the goods will be tested before shipment.

For the in stock items, we will send the order out within 5-7 days after receive the payment.

Global supplier of quality automation and control components.

Topteng offers a 12-month warranty from the date of delivery.

In the event of non-conforming product ( if damaged or incorrect product is received ),

Any nonconformity must be reported within 7 days of receipt of goods.

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