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Minilec Motor and Pump Protection Relays

Minilec Motor and Pump Protection Relays Specification

Coil Power
Approx. 1W

Power Consumption
Less than 4VA

Ambient Temperature
-10C to 55C

Coil Voltage
230/415V AC

Contact Material
Silver Alloy

Contact Resistance
Less than 50 m

Mechanical Life
More than 1 million operations

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

Working Temperature
-10C to 55C

Protect Feature
Overload, Phase Failure, Phase Sequence, Under/Over Voltage

Contact Form
1 C/O (Change Over)

Product Type
Motor & Pump Protection Relay

Insulation Resistance
>100M at 500V DC

Theory
Electromagnetic Relay

Usage
Motor and Pump Protection

Contact Load
5A at 250V AC

Operate Time
Less than 2 seconds

Terminal Type
Screw Terminals

Rated Voltage
230V AC / 415V AC

Supply Terminal
Top/Bottom

Size
Compact, DIN Rail Mountable

Color
White/Grey

Dimension (L*W*H)
90mm x 36mm x 65mm (Approx.)

Weight
Approx. 200-350g (model dependent)

Frequency
50/60 Hz

Reset Type
Automatic / Manual reset selectable

Conformity
IS/IEC Standards Compliant

Mounting Type
DIN Rail Mountable, Panel mounting option available

Response Time
Fast tripping for high protection

Typical Application
Submersible Pump, Industrial Motors, Agriculture, Domestic Motor Control Panels

Sensing Method
True RMS sensing for accuracy

LED Indication
Power ON, Fault, Relay Status

Protection Delay
Adjustable delay for Under/Over Voltage

Humidity Resistance
Up to 95% RH (non-condensing)

About Minilec Motor and Pump Protection Relays

Minilec Motor and Pump Protection Relays

OVERVIEW :-

	Phase Failure
	Unbalance
	Phase sequence
	Overloading and dry running Auto/Manual Reset
	Adjustable current trip settings
	Adjustable overload characteristics
	1CO output relay

TECHNICAL SPECIFICATION:-

Supply Voltage

System	:	220-240/380-440 V AC ±20% 50/60 Hz ±3%
Auxillary	:	110 / 240 / 380/ 415 V AC ±20% 50 / 60 Hz

Output Relay Contact		:	1 CO

Input		:	From CTS

Trip Setting
	Phase to phase unbalance	:	50% of I FLC
	Under current (Dry running)	:	50% or 75% of I SET
	Overload	:	Above 120% of set current (IDMTL)
	UV/OV	:	N.A.

Trip Time Delay

	On phase failure	:	5.5 secs. ± 1.5 secs.
	For overloading	:	As per selectable inverse time Characteristics 2 - 10 secs. (variable)
	UV/OV RP	:	N.A.

Resetting		:	Auto / Manual / Remote

Approx Weight		:	425 gms.

Dimensions (mm)

Overall (L x W x D)	:	96 x 96 x 76
Mounting (L x W)	:	92 x 92

Note:

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

Selection Chart For CTS	Times full Load Current

CONNECTION DIAGRAM:-

Timing/ Relay logic Diagram	Electrical Connection Diagram

Relay contact position shown in 'Power off' condition

APPLICATION :-

Suitable for Panels in Following Applications:

	Submersible Pump Control Panels.
	Air Handling Unit Fans.
	Belt Conveyor Motor panels for zero speed sensing.

Accurate and Reliable System Protection

Minilec relays utilize True RMS sensing, ensuring precise detection of voltage irregularities for motors and pumps. The device reacts within less than two seconds, minimizing equipment damage and prolonging operational life. Fast tripping and adjustable protection delay options enhance safety, while adherence to IS/IEC standards guarantees consistent, compliant performance.

Versatile Installation and User-Friendly Design

These protection relays accommodate both DIN rail and panel mounting, making integration into control panels seamless. Screw terminals and selectable supply points (top/bottom) allow quick, secure wiring. The compact size saves panel space, and clear LED indications for power, fault, and relay status promote easy monitoring for operators.

FAQs of Minilec Motor and Pump Protection Relays:

Q: How do I install the Minilec Motor and Pump Protection Relay in my control panel?

A: The relay supports both DIN rail and panel mounting, ensuring compatibility with various control panels. Simply secure the device using the appropriate mounting option, connect wiring via the screw terminals, and select the supply terminals on either the top or bottom as per your panel configuration.

Q: What is the benefit of fast tripping and adjustable delay in protection?

A: Fast tripping (less than 2 seconds) minimizes damage during faults, while the adjustable delay for under/over voltage protection allows users to tailor response times to their applications needs, preventing nuisance tripping and enhancing equipment safety.

Q: When should the automatic or manual reset option be selected?

A: Automatic reset is suitable for unattended installations where quick restart after fault clearance is desired. Manual reset is preferred in applications requiring operator intervention after faults, enabling a thorough inspection before resuming operations.

Q: Where can these protection relays be used effectively?

A: Minilec relays are ideal for submersible pumps, industrial motors, agricultural systems, and domestic motor control panels. Their robust design, humidity resistance, and wide operating temperature range allow effective protection in varied environments.

Q: What LED indications are available and what do they signify?

A: Three LEDs provide immediate visual status: Power ON indicates live operation, Fault signals detected anomalies, and Relay Status shows the operational state, aiding quick troubleshooting and maintenance decisions.

Q: How does True RMS sensing improve protection accuracy?

A: True RMS sensing accurately detects and analyzes voltage fluctuations, even with distorted waveforms, ensuring reliable protection against overload, phase failure, phase sequence errors, and voltage anomalies.

Q: What are the advantages of using Minilec relays for motor and pump protection?

A: These relays offer comprehensive protection features, compact design, high mechanical life, compliance with IS/IEC standards, and flexible mounting options, making them a dependable choice for safeguarding motor and pump operations in diverse settings.

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