Three sets of 80A contacts, impulse-driven coil and 1500A/10ms short-circuit withstand in a 63.5 x 29 x 29 mm fast-connection package for smart and prepaid electricity meters.
GRT508FL 3x80A - housing and terminal layoutGRT508FL 3x80A - side angle, fast connection terminals
Product Summary
The GRT508FL is a three-pole latching relay developed for smart metering and prepaid metering circuits. Three sets of AgSnO2 contacts switch up to 80A at 380VAC, and the relay keeps its last position after a single impulse, so no continuous coil power is needed to hold the circuit state. A 63.5 x 29 x 29 mm outline with fast connection terminals keeps the footprint compact on meter boards.
Key Features
80A on three contact setsRated resistive load of 80A across three poles lets one relay handle multi-phase meter circuits instead of several single-pole devices.
Impulse excitation onlySingle and double coil drive are both supported, so the coil is energised only for switching and the set position is held mechanically.
4KV coil-to-contact dielectric strengthHigher isolation between drive side and load side supports the separation design of metering front-ends.
1500A/10ms short-circuit withstandNo explosion at the rated fault current, protecting meter assemblies during abnormal grid events.
100,000 operations mechanical enduranceLong service life with an ambient range of -40 to +85 degrees Celsius for outdoor meter cabinets.
Compact and RoHS compliant63.5 x 29 x 29 mm outline, low power consumption and RoHS compliance for EU-bound meter programmes.
Technical Specifications
Model
GRT508FL
Relay type
3-pole latching relay, three sets of contacts
Rated load (resistive)
80A
Max. switching current
80A
Max. switching voltage
380VAC
Contact material
AgSnO2
Coil voltage
5-24 VDC
Dielectric strength (coil to contacts)
4KV
Max. short-circuit current
1500A/10ms (no explosion)
Mechanical endurance
100,000 OPS
Ambient temperature
-40 degrees C to +85 degrees C
Installation form
Fast connection
Outline dimensions
63.5 x 29 x 29 mm
Compliance
RoHS compliant
Models and Options
Coil voltage selection from 5 VDC to 24 VDC.
Single coil and double coil versions, both driven by impulse excitation.
Three-pole 80A configuration for multi-phase metering circuits.
Custom assemblies available with flexible wire, copper straps and/or integrated shunt.
Materials and Structure
The relay is built on a copper and plastic construction with AgSnO2 contact tips for arc resistance under resistive load switching. The three contact sets share one compact 63.5 x 29 x 29 mm body, and the fast connection terminal design simplifies wiring on meter assemblies. Coil and contact circuits are separated by a 4KV dielectric barrier.
Applications
The GRT508FL is used in the smart metering industry for on-off control of energy meter circuits, where the relay latches after switching and consumes no coil power in the held state. Typical matched equipment includes smart electricity meters and energy measurement modules, as well as prepaid meter and smart home latching relay designs. Metering project conditions include ambient temperatures of -40 to +85 degrees Celsius, 5 to 85 percent relative humidity non-condensing, altitude up to 2000 m, no corrosive gas or explosive dust, PCB soldering or screw mounting, and resistive load.
Customization
Custom latching relay assemblies can be supplied with flexible wire and/or copper straps and/or an integrated shunt, matching the terminal layout of a specific meter platform. Coil voltage, single or double coil drive and assembly format are agreed per project. Please share drawings and electrical requirements for evaluation.
FAQ
Which coil voltages are available?
The GRT508FL is offered with coil voltages from 5 VDC to 24 VDC.
Does the relay need continuous power to stay closed?
No. It is impulse-driven and holds its position after switching, so the coil does not draw power in the latched state.
Can it be driven by a single coil or a double coil?
Both. Only impulse excitation is required for single coil and double coil versions.
What short-circuit level can it withstand?
A maximum short-circuit current of 1500A/10ms with no explosion.
What is the isolation between coil and contacts?
4KV dielectric strength between coil and contacts.
What is the operating temperature range?
-40 degrees C to +85 degrees C, with 100,000 operations mechanical endurance.
Can you supply a custom terminal assembly?
Yes, custom assemblies are available with flexible wire and/or copper straps and/or an integrated shunt.
Inquiry Information
Zhejiang Great Electrical Co., Ltd. Contact: Annie | Mobile: +86 13626734569 | WhatsApp: +86 18057329886 E-mail: sales5@great-relay.com | Website: en.grtrelay.com Address: No.9 Linhu Avenue, Yaozhuang Town, Jiashan County, Jiaxing City, Zhejiang Province, China
Please include coil voltage, single or double coil drive, terminal or assembly requirements and your target annual quantity in your inquiry.
Image Filenames and Alt Suggestions
grt508fl-3x80a-fast-connection-front.jpg - Alt: GRT508FL 3x80A latching relay, front view of the three-pole housing
grt508fl-3x80a-fast-connection-side.jpg - Alt: GRT508FL latching relay side angle showing fast connection terminals
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