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Minilec Ground Fault Monitoring Relays S2 CMR4

Minilec Ground Fault Monitoring Relays S2 CMR4 Specification

Coil Voltage
According to model selection

Contact Resistance
<50 m max (initial)

Protect Feature
Ground fault detection, fail-safe operation

Contact Material
Silver Alloy

Mechanical Life
10^7 operations

Dielectiric Strength
2kV AC for 1 minute between contacts and coil

Contact Form
1 CO (Change Over)

Ambient Temperature
-10C to +55C

Working Temperature
-10C to +55C

Power Consumption
<3 VA

Coil Power
Approximately 2-3 VA

Product Type
Ground Fault Monitoring Relay

Insulation Resistance
>100 M at 500V DC

Theory
Electromagnetic Relay System

Usage
Ground Fault Protection and Monitoring

Contact Load
5A at 250V AC (resistive)

Operate Time
<100 ms

Terminal Type
Screw type terminals

Rated Voltage
230V AC / 110V AC / 24V DC (as per model)

Supply Terminal
Rear side terminals

Size
96 x 48 mm (standard)

Color
Grey & White

Dimension (L*W*H)
96 mm x 48 mm x 110 mm

Weight
Approx. 160 g

Refresh Rate
60 Hz

Operating System
Android

Remote Battery Type
AAA

Sleep Timer
Yes

Viewing Angle
178

USB Ports
2

Smart TV Features
Built-in WiFi, Screen Mirroring

About Minilec Ground Fault Monitoring Relays S2 CMR4

Minilec Ground Fault Monitoring Relays

OVERVIEW :-

	Earth leakage monitoring of 3 phase systems,
	Microcontroller based design,
	SMD technology, Manual Reset,
	Input through CBCT,
	Adjustable trip setting,
	Adjustable trip delay & ON delay,
	2 CO relay output
	Failsafe-non-failsafe seletable

TECHNICAL SPECIFICATION:-

Supply Voltage

	System	:	100-120/220-240/380-440 V AC ± 20%, 48-63 Hz
	Auxillary	:	100-110/240V AC / 24V DC ± 20%

Ext. Input

300mA CBCT (Secondary)

Output Contacts

2 CO

Trip Setting

EF Trip Setting	:	10% - 100% of Rated Current Input (Variable) (Input through CBCT of 300m A Secondary)
Under Current	:	N.A.
Over Current	:	N.A.

Power On Delay

1-10 Sec. (Adjustable)

Trip Time Delay

0.1 Sec to 1 Sec. (Adjustable)

Resetting

Manual

Weight

140 gms.

Dimensions (mm)

	Overall (L x W x D)	:	90 x 35 x 60
	Mounting (L x W)	:	35 mm rail Mounting

Note:

Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)

APPLICATION:-

Suitable for following application:
	Generator panels
	Synchronizing Control Panels
	AMF Panels, MCC panels
	Air Circuit Breakers (With shunt Trip Coil)
	MCCB (With Shunt Trip Coil)
	Motor Control Panels

S2 CMR4 S2 CMR4

Comprehensive Fault Protection

Monitor and safeguard your industrial systems with Minilec S2 CMR4 Ground Fault Monitoring Relays. Designed for critical ground fault detection, this device features instantaneous and definite time response modes, adjustable sensitivity, and robust insulation. Its fail-safe design underpins dependable system protection, reducing downtime and equipment damage.

Versatile and User-Friendly Design

With selectable manual or automatic reset, convenient panel mounting, and intuitive LED indications for both relay and fault status, the S2 CMR4 relay prioritizes operational simplicity. The screw-type terminals and rear-side supply access support seamless installation and maintenance, fitting effortlessly into standard control panels.

Durability and Regulatory Compliance

Built with flame-retardant engineering plastic, the relay withstands tough environmentshigh humidity (up to 95% RH) and wide temperature ranges. Its compliance with IS/IEC standards, high mechanical life, and excellent insulation resistance highlight its long-term suitability for demanding LT/HT power systems.

FAQs of Minilec Ground Fault Monitoring Relays S2 CMR4:

Q: How do I adjust the trip current setting on the Minilec S2 CMR4 relay?

A: You can adjust the trip current setting using the onboard controls, allowing for precise sensitivity from 20 mA up to 500 mA, enabling tailored ground fault protection for your specific application.

Q: What happens when a ground fault is detected by the relay?

A: Upon detecting a ground fault, the relay activates its LED indication for fault and relay status. Depending on your selected response type (instantaneous or definite time), the relay will open its potential-free changeover contact to disconnect the circuit, protecting your system.

Q: Where can the S2 CMR4 relay be installed?

A: This relay is designed for panel mounting and is suitable for use in industrial electrical panels, power distribution systems, and LT/HT applications, providing ground fault monitoring in a compact, standardized form factor (96 x 48 mm).

Q: What are the reset options for the Minilec S2 CMR4 relay?

A: The device supports both manual and automatic reset modes. You can select the preferred reset method during setup to suit your operational requirements and system protocols.

Q: What benefits does using a ground fault monitoring relay like S2 CMR4 provide?

A: Implementing the S2 CMR4 enhances safety by detecting insulation faults early, reducing the risk of equipment damage and fire. It ensures system reliability, minimizes downtime, and supports compliance with safety regulations.

Q: Which supply voltages are compatible with the Minilec S2 CMR4 relay?

A: Depending on the specific model, the relay operates on 230V AC, 110V AC, or 24V DC, offering flexibility for different power setups in industrial environments.

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