Cromton

Protector Trip Relays
250 Series DIN Rail and Wall Mounted

Protectors
Our protector trip relays offer continuous surveillance of electrical parameters. When the monitored parameter moves outside the set point limit, the relay operates. A.C. and D.C. voltage A.C. and D.C. current Frequency Phase sequence Phase failure Phase balance Thermistor Thermocouple Transducer Millivolt trips Hot spotrelays Speed sensing Synchro-check relays Reverse power R.O.C.O.F. vector shift
U.S. Standard, IEC 414 0°C to 60°C (0°C to +40°C for UL approval) Storage Temperature: -20°C to 70°C Temp. Co-efficient: 0.05% per °C Interference Immunity: Electrical stress surge withstand and non function to ANSI/IEEE C37 90a Enclosure Code: IP50 to BS5490, IEC 529 Calibrated at: 23°C Auxiliary: A.C. 50/60Hz: 110,120, 230, 240, 400 or 415, or 440V + 20% D.C.: 12, 24, 48, 110, 125, 135V (maximum 156V D.C.) + 15% Maximum ripple 15% Safety Requirements: Temperature Range: Burden: Output Relay Type: Ratings: A.C.: D.C.: Operations: Reset: Weight: 4VA maximum D.P Changeover 240V, 5A non-inductive 24V, 5A resistive 0.2 million at the above loads Automatic 252 case - approx 0.4Kg 253 case - approx 0.6Kg 256 case -approx 1.0Kg File Number E113067 (where applicable) File Number LR52592 (where applicable) Bureau Veritas (BV) File No: 2650H-07427-A0 PRSOBV (where applicable) ABS American Bureau of Shipping (where applicable)

Over half a million Protector units have been tried and tested, in many industrial environments. Successfully used in alarm protection and control functions, typically in 3 phaseelectrical power systems, control panels & gensets.

Specification

Approvals:

Max. D.C. Load Breaking Capacity with resistive load

Casing
All products can be DIN rail or wall mounted. 253 and 256 cases have screw holes to facilitate wall mounting. 252 cases are supplied with an adaptor plate for wall mounting. All products are supplied with a clear terminal cover/anti-tamper cover,manufactured from flame retardent polycarbonate.

Ordering Information
Please quote: 1. Product Code 2. Function i.e. Under or Over 3. Relays normally de-energize on under trip and energize on over trip. Please specify standard or non standard trip, because standard relays are configured for a fail safe. 4. System Voltage and/or Currents where applicable 5. System Frequency 6. Auxiliary Voltage whererequired 7. Preset Differential where required 8. Time delay where applicable 9. On temperature trips quote temperature span & sensor type and set points and trip temperatures

Protector Relays
Web: www.crompton-instruments.com • Email: crompton.info@tycoelectronics.com

2002

Protector Trip Relays
250 Series DIN Rail and Wall Mounted A.C. Current
The Crompton A.C. current protectorsprovide continuous surveillance of the monitored circuit. When the current moves outside the setpoint limit, the relay operates.

Features
Adjustable setpoint Adjustable differential Internal time delay LED trip indication 2 pole relay contacts

An illuminated LED indicates when the relay is energized. For 3 phase systems, the sequence of connection is not important. The Protector can be used tomonitor: • • • Over and Under current conditions Load detection Monitoring of electric heating systems

Introduction
Crompton A.C. Current Protectors provide continuous surveillance of the monitored circuit. These products offer user adjustable trip point (setpoint) and time delay settings. The setpoint adjustment range is between 40% and 120% of the nominal current. Input currents can be viacurrent transformers or direct up to 10A. An internal differential setting of 1% reduces nuisance tripping if the measured signal is noisy or unstable. When the measured current moves outside the setpoint limit, the relay will operate, giving an alarm or initiation signal. As soon as the monitored signal moves outside of the setpoint limit, a trip will occur. An adjustable time delay is provided...