GDV-20-385-1+1-FM AC Power Surge Protective Device, Class II, 1+1 Configuration with Remote Signaling

Description

The GDV-20-385-1+1-FM is a Class II AC power surge protective device (SPD) designed for lightning overvoltage protection of single-phase AC power supplies. It uses a 1+1 configuration to protect both the L-N and N-PE paths, with a nominal discharge current In of 10 kA and a maximum discharge current Imax of 20 kA.

Product Overview

The GDV-20-385-1+1-FM is an AC power surge protective device intended for Class II lightning overvoltage protection on single-phase AC supply systems. It provides protection between line and neutral (L-N) and between neutral and protective earth (N-PE). The device includes a visual status indicator and a remote signaling changeover contact for monitoring.

Key Features

• Class II surge protective device for single-phase AC power
• 1+1 configuration protecting both L-N and N-PE paths
• Nominal discharge current In: 10 kA
• Maximum discharge current Imax: 20 kA
• Voltage protection level Up: ≤1.2 kV (L-N), ≤0.8 kV (N-PE)
• Response time tA: 25 ns (L-N), 100 ns (N-PE)
• Visual status indication: green for normal, red for failure
• Remote signaling changeover contact
• 35 mm DIN rail mounting
• Housing material PC+ABS with UL94-V0 flame rating
• IP20 enclosure protection

Technical Specifications

Parameter	Value
Model	GDV-20-385-1+1-FM
SPD classification	II
Nominal operating voltage Un	220V~
L-N maximum continuous AC operating voltage Uc	385V~
N-PE maximum continuous AC operating voltage Uc	255V~
Nominal discharge current In	10kA
Maximum discharge current Imax	20kA
L-N voltage protection level Up (In@8/20µs)	≤1.2kV
N-PE voltage protection level Up (In@8/20µs)	≤0.8kV
L-N response time tA	25ns
N-PE response time tA	100ns
L-N, N-PE status indication	Green: normal / Red: failure
Mounting method	35mm DIN rail
Conductor connection capacity	≤25mm²
Maximum torque	3.2Nm~3.7Nm
Housing material	PC+ABS
Housing material flame rating	UL94-V0
Remote signaling contact type	Changeover contact
Remote signaling contact AC performance	250V/0.5A
Remote signaling contact DC performance	125V/0.2A
Enclosure protection rating	IP20
Temperature (humidity) range	-40℃ to +80℃, relative humidity ≤95%
Altitude	≤3000m
Main body dimensions	90mm×65.3mm×36mm (tolerance ±1 mm)

Applications

The GDV-20-385-1+1-FM is used for Class II lightning overvoltage protection of single-phase AC power supplies. It is suitable for installation in AC power distribution systems where protection between L-N and N-PE is required.

Installation and Use

The device can be connected using the conventional direct parallel wiring or V-shaped wiring shown in the wiring diagram. For better protection with direct parallel wiring, keep the wiring as short as possible, with a total length within 0.5 m.

Use 4-16 mm² multi-core copper conductors for the connection. A suitable circuit breaker or fuse must be connected upstream of the device; the circuit breaker should have a C trip characteristic.

Disconnect the power supply before installation. Live operation is strictly prohibited. The connecting conductors must meet the requirements.

When the SPD is working normally, the status indicator window is green, the alarm dry contact NC-COM is conducting, and the alarm dry contact NO-COM is open. When the SPD fails, the status indicator turns red, the alarm dry contact NC-COM becomes open, and the alarm dry contact NO-COM becomes conducting.

The SPD requires no special maintenance. Periodically check whether the module is loose and whether the status indication is normal.

The SPD can be judged as failed and should be replaced promptly if either of the following occurs: the status indicator turns red, or the alarm dry contact becomes open.

Frequently Asked Questions

What is the difference between the L-N and N-PE protection levels?

The L-N voltage protection level Up is ≤1.2 kV, and the N-PE voltage protection level Up is ≤0.8 kV, both measured at In with an 8/20 µs waveform.

How do I know when the SPD has failed?

When the SPD fails, the status indicator changes from green to red, and the alarm dry contact NC-COM becomes open while NO-COM becomes conducting.

What conductor size should be used?

Use 4-16 mm² multi-core copper conductors for the connection.