Product Overview

This switchgear status display unit is designed for indoor 3-35kV electrical cabinets where operators need a clear visual view of breaker position, earthing switch status, energy storage condition, live voltage presence, and cabinet environment signals. It is suitable for central cabinets, handcart cabinets, fixed cabinets, ring main units, and other switchgear panels that require compact front-panel monitoring.

The device integrates switch status indication with cabinet temperature and humidity control. It can support two-channel temperature and humidity sensing, heater control, condensation control, and optional RS485 communication with MODBUS protocol, making it practical for modern power distribution rooms and panel automation.

Key Features

Clear mimic diagram indication for breaker closing, opening, test position, working position, earthing switch status, and stored energy state.
Live voltage display for three-phase high-voltage circuits with optional lock output logic.
Dual temperature and humidity sensor inputs for cabinet environment monitoring.
Supports automatic or manual heater control to reduce condensation risk inside the switchgear cabinet.
Optional fault or disconnection alarm outputs for temperature and humidity sensor circuits.
Optional RS485 communication interface using standard MODBUS protocol.
Embedded panel installation with a compact front appearance for electrical cabinet doors.
Low power consumption design suitable for continuous switchgear monitoring.

Main Technical Specifications

Item	Specification
Application range	Indoor 3-35kV switchgear cabinets and distribution panels
Power supply	AC110-265V 50Hz; DC110-265V
Working environment	-15°C to +55°C; relative humidity <=95%RH; altitude <=2000m
Temperature control accuracy	+/-3°C
Humidity control accuracy	+/-5%RH
Start threshold	5°C for temperature; 88%RH for humidity
Power consumption	<=3W
Withstand voltage	Greater than AC2500V between enclosure and terminals
Insulation performance	Greater than 500M ohm between enclosure and terminals
Anti-interference standard	Complies with IEC255-22
Contact capacity	3A / AC250V resistive
Installation method	Embedded panel mounting
Panel opening size	181 x 121 mm

Function Configuration

Function	Description
Breaker status indication	Displays breaker closing and opening status through front-panel indication.
Handcart position indication	Shows test position and working position for withdrawable switchgear applications.
Earthing switch indication	Displays earthing switch closing and opening status.
Energy storage indication	Indicates stored energy condition for operating mechanism monitoring.
Live voltage indication	Displays A, B, and C phase live voltage presence from the high-voltage sensor input.
Lock output	Provides passive lock output logic for live display related interlocking functions.
Temperature and humidity control	Two sensor channels can control heating and condensation removal according to preset thresholds.
Alarm output	Optional load disconnection or fault alarm output for cabinet environment control circuits.
Communication	Optional RS485 interface with MODBUS standard protocol for remote monitoring.

Terminal Reference

Terminal	Function
1-2	AC/DC110-265V instrument power supply
3	Working position input
4	Test position input
5	Breaker closed input
6	Breaker open input
7	Energy storage input
8	Earthing switch closing/opening input
9	Common terminal
10-12	Temperature and humidity sensor A
12-14	Temperature and humidity sensor B
15-16	Optional RS485 communication interface
17-18	Heater power supply, AC220V
19-20	Temperature control load output
21-22	Condensation control load output
23-24	Passive lock output
25-28	High-voltage live sensor input

Typical Applications

The product is suitable for switchgear panels that need front-panel status visualization, environmental control, and optional remote data transmission.

Medium-voltage central switchgear cabinets
Withdrawable handcart switchgear panels
Fixed switchgear cabinets and ring main units
Power distribution rooms and substations
Industrial control panels with cabinet anti-condensation requirements
Electrical systems requiring breaker, earthing, and live-voltage status indication

Installation and Commissioning Notes

Use embedded installation and reserve a panel cutout of 181 x 121 mm.
Confirm the instrument power supply matches AC/DC110-265V before wiring.
Complete wiring according to the terminal definition and verify each switch input before energizing the cabinet.
For heater testing, ensure the instrument power and heater circuit are connected correctly, then use manual or automatic control according to the cabinet requirement.
For condensation control testing, connect the temperature and humidity sensor correctly and verify the corresponding heater output under threshold conditions.
During high-voltage live display testing, switch off rear power and remove connected terminals before high-voltage withstand testing to avoid damaging the instrument or sensors.

Why Choose This Product

For medium-voltage switchgear, operators need more than a simple lamp display. This device combines position indication, live voltage display, heater control, cabinet environment monitoring, and optional communication in one compact panel unit. It helps improve cabinet visibility, reduce condensation-related risks, and simplify switchgear front-panel design.

Ordering Information

When ordering, please confirm the required power supply, front-panel diagram style, temperature and humidity sensor configuration, heater output requirement, RS485 communication option, MODBUS requirement, and any customized terminal or indicator logic.

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