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Minilec Frequency Monitoring Relays OFS D1

Minilec Frequency Monitoring Relays OFS D1 Specification

Contact Form
SPDT

Ambient Temperature
-10C to +55C

Coil Voltage
230V AC

Contact Material
AgCdO

Contact Resistance
< 100 m

Mechanical Life
> 1 Million Operations

Coil Power
Approx. 1W

Power Consumption
< 2VA

Protect Feature
Over/Under Frequency Protection

Dielectiric Strength
2 kV for 1 Minute

Working Temperature
-10C to +55C

Product Type
Frequency Monitoring Relay

Insulation Resistance
> 100 M at 500V DC

Theory
Electromechanical

Usage
Frequency Monitoring in Electrical Panels

Contact Load
5A at 230V AC

Operate Time
< 200ms

Terminal Type
Screw Type

Rated Voltage
230V AC

Supply Terminal
L, N Terminals

Size
Compact

Color
Grey

Dimension (L*W*H)
44 x 69 x 90 mm

Weight
120g Approx.

Frequency Range
45-55 Hz (Adjustable)

Output Indication
LED

Recovery Type
Auto Reset

Relay Output
Potential Free

Threshold Setting
Adjustable by Potentiometer

Mounting Type
DIN Rail Mounting

Case Material
High Grade ABS Plastic

Response Time
< 200ms

Minilec Frequency Monitoring Relays OFS D1 Trade Information

Minimum Order Quantity
1 Unit

Payment Terms
Telegraphic Transfer (T/T)

Supply Ability
Unit

Delivery Time
As Per Requirement Week

Main Domestic Market
All India

About Minilec Frequency Monitoring Relays OFS D1

Minilec Frequency Monitoring Relays

OVERVIEW:-

Single phase over frequency,

Auto reset,

Adjustable over frequency trip settings,

Adjustable trip delay,

1 CO output relay

TECHNICAL SPECIFICATION :-

Supply Voltage

	System	:	100-120 / 220-240 / 380-440 V AC ±20%
	Auxillary	:	12 / 24 V DC or Built in

Ext. Input

Output Contacts

1 CO

Trip Setting

Under Frequency	:	N.A.
Over Frequency	:	50 Hz - 70 Hz
Reverse Power	:	-

Power On Delay

3.5 secs. ± 1.5 sec (fixed)

Trip Time Delay

1-10 Secs. (Adjustable)

Resetting

Auto

Weight

450 gms.(Approx)

Dimensions (mm)

	Overall (L x W x D)	:	76 x 30.5 x 117.5
	Mounting (L x W)	:	68 centre to centre / 35 mm Rail Mounting

Note:

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

APPLICATION:-

Generator panels.

AMF Control panels.

Sophisticated medical equipments.

OFS D1 OFS D1

Reliable Frequency Detection

The OFS D1 provides accurate frequency oversight, automatically resetting when conditions stabilize. It operates within a 4555 Hz adjustable range, protecting critical equipment in electrical panels from over or under frequency incidents. Its compact size and robust build make it suitable for various environments, ensuring consistent performance.

Effortless Installation and Configuration

DIN rail mounting and screw-type terminals allow swift installation in standard electrical panels. The adjustable threshold, set via potentiometer, enables tailored operation to meet specific system requirements. Its supply is easily connected with standard L, N terminals, simplifying integration into new or existing setups.

FAQs of Minilec Frequency Monitoring Relays OFS D1:

Q: How does the Minilec OFS D1 Frequency Monitoring Relay function?

A: The relay monitors the system frequency in real time. If the frequency deviates beyond the programmed 4555 Hz range, it triggers the output (with LED indication), providing over/under frequency protection until recovery occurs automatically.

Q: What are the main usage scenarios for this relay?

A: It is primarily used in electrical panels for industrial, commercial, and utility applications, protecting sensitive equipment from frequency variations, thereby improving supply reliability and system safety.

Q: When should I adjust the frequency threshold settings, and how is it done?

A: Threshold settings should be adjusted during installation or maintenance to suit the operational requirements of the system. Adjustment is accomplished using the built-in potentiometer on the device, allowing precise control over the monitored range.

Q: Where is the optimal location for installing the OFS D1 relay?

A: The relay is best installed inside an electrical panel, mounted on a DIN rail for stability and easy accessibility. Its compact size facilitates placement even in panels with limited space.

Q: What are the benefits of the auto reset recovery feature?

A: Auto reset allows the relay to return to normal operation automatically once the system frequency is back within safe limits, ensuring uninterrupted protection and reducing manual intervention.

Q: How does the relays output indication work?

A: The relay features an LED output indication, which lights up to signal when the relay is activated due to a frequency anomaly. This provides a clear visual alert for immediate status identification.