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Products I Motor / Pump Protection Relays I WTR D1



WTR D1
  Sensing motor winding temperature through PTC Thermistors.
  Winding overheating, sensor short, sensor open faults.
  Suitable for single, triple or 6/9/12 PTC’s
Supply Voltage    
  Auxiliary
: 110-120/220-240/380-440 V AC/24 V DC 50Hz(60 Hz)±10%

Output Contacts : 1 CO

Trip Setting
 
  Thermistor Sensor Healthy
  Thermistor Sensor Trip
  Thermistor Sensor Open
  Thermistor Sensor Short
:
:
:
:
40 ohm - 4 K ohm
4.1 K ohm - 5.5 K ohm
5.6 K ohm and above
39 ohms and below

Trip time delay : Less than 2 secs.

Resetting : Below 1.51 K

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

Weight : 300 gms.

Resetting Mode : Auto / Manual (Optional)

Note:
Wherever not specified Contact Rating : 5A @ 230 V AC (resistive)
Typical Characteristic of PTC

Electrical Connection Diagram

WTR D1 WTR D1

Relay contact position shown in 'Power off' condition
Winding over heating for motors used in:
Injection Molding M/Cs
Machine Tools
Drilling Equipments
Crane & Hoist Motors
Compressors & Fan Motors OR
Transformer Control Panel
 
 
 
 



MODELS

Motor / Pump Protection Relays

Microprocessor Based Pump Automation System

Winding Over - Temperature Protection Relays