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Minilec Motor and Pump Protection Relays SPG D2

Minilec Motor and Pump Protection Relays SPG D2 Specification

Working Temperature
-10C to +50C

Power Consumption
<4VA

Contact Form
1 C/O (SPDT)

Contact Resistance
<50 m

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

Coil Voltage
Same as supply voltage

Dielectiric Strength
2000V AC for 1 min

Ambient Temperature
-20C to +55C

Contact Material
Silver Alloy

Mechanical Life
10^6 operations

Coil Power
<2W

Product Type
Motor and Pump Protection Relay

Insulation Resistance
>100 M at 500V DC

Theory
Electromechanical Relay

Usage
Motor and Pump Protection

Contact Load
5A at 250V AC

Operate Time
2-10 Sec Adjustable

Terminal Type
Screw Terminal

Rated Voltage
415V AC

Supply Terminal
L1, L2, L3

Size
Compact

Color
White and Blue

Dimension (L*W*H)
91 x 36 x 58 mm

Weight
160 grams (approx.)

Storage Temperature
-25°C to +70°C

Reset Type
Automatic/Manual reset selectable

Enclosure Material
Flame Retardant ABS Plastic

Applicable Load
Three Phase Motors and Pumps

Indication
LED status indicators

Trip Setting
Adjustable settings for protection parameters

Humidity
Up to 95% RH (non-condensing)

Mounting Type
DIN Rail Mounting

Frequency
50/60 Hz

Response Time for Phase Failure
<200 ms

About Minilec Motor and Pump Protection Relays SPG D2

Minilec Motor and Pump Protection Relays

OVERVIEW :-

	Phase Failure
	Unbalance
	Phase sequence
	Overloading and Dry running Auto / Manual Reset
	Adjustable current trip settings
	Selectable overload characteristics
	1CO/2CO output relay

TECHNICAL SPECIFICATION:-

Supply Voltage

System	:	100-120/220-240/380-440V AC ±20%
Auxillary	:	110/240/380/415/440 V AC/ 24 V AC/DC ±20%, 50 / 60 Hz

Output Relay Contact		:	1 CO (2 C0)

Input		:	From CTS

Trip Setting
	Phase to phase unbalance	:	50% of motor Current
	Under current (Dry running)	:	50%/75% of set current
	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 / 5 secs (10 secs.)
	UV/OV RP	:	N.A.

Resetting		:	Auto / Manual / Remote

Approx Weight		:	425 gms.

Dimensions (mm)

Overall (L x W x D)	:	76 x 56.5 x 117.5
Mounting (L x W)	:	67 x 46 / 35 mm rail Mounting

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

APPLICATION :-

Suitable for Panels in Following Apllications:

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

Optimized Motor & Pump Safety

Guard your valuable equipment with reliable protection from phase-related issues and voltage anomalies. The SPG D2 helps extend the operational life and efficiency of three-phase motors and pumps by actively monitoring parameters and preventing damage from common electrical faults.

User-Friendly Features

The relay comes equipped with clear LED status indicators, easy-to-adjust protection parameters, and supports both automatic and manual resets for operational flexibility. Screw terminals ensure secure connections, while the compact design allows for quick DIN rail mounting in control panels.

Built for Harsh Environments

Engineered with flame-retardant ABS and designed to operate under high humidity and wide temperature ranges, the SPG D2 is suited for demanding industrial applications in diverse Indian climates. Its robust electrical specifications ensure long-term reliability and safety.

FAQs of Minilec Motor and Pump Protection Relays SPG D2:

Q: How does the SPG D2 relay protect motors and pumps?

A: The SPG D2 monitors electrical parameters such as phase sequence, phase failure, under/overvoltage, and unbalance. When a fault is detected, it quickly disconnects the load within 200 ms, helping prevent damage to three-phase motors and pumps.

Q: What are the benefits of using LED status indicators?

A: LED status indicators provide instant visual feedback about relay and system conditions, enabling quick diagnostics and reducing downtime during maintenance or troubleshooting.

Q: Where can the SPG D2 be installed?

A: The relay is designed for DIN rail mounting, making it suitable for installation in electrical panels and enclosures commonly found in industrial, commercial, and agricultural settings across India.

Q: When should I use the automatic versus manual reset option?

A: Automatic reset is useful when you want the relay to restore power after the fault condition clears, ensuring quick resumption of operation. Manual reset provides better control and is ideal when safety protocols require an inspection before restarting equipment.

Q: What is the process for setting protection parameters?

A: Protection settings such as trip levels for voltage, unbalance, and operate time (210 seconds) can be easily adjusted using the onboard controls, allowing customization according to your motor or pumps requirements.

Q: How does the relay support operation in extreme environments?

A: The SPG D2 operates reliably in ambient temperatures from -20C to +55C, with storage tolerance up to +70C. It handles humidity up to 95% RH (non-condensing) and features a flame-retardant enclosure for enhanced safety.

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