Basic Motor Protection – C

Basic Motor Protection – C

  • Gives excellent protection for L.V. motors up to 1000 Vac
  • Broad range of current adjustment (1 to 630 and over)
  • Discriminative signalling of the relay trip cause
  • Suitable for any type of motor start or working cycle. Three types of adjustement for trip class, 10, 20 and 30
  • Memorizes the thermal image of the motor, either heating or cooling
  • External display module (22,5 mm)
  • Three-year guarantee
 

Model

Code

Range Motor 400 V Protections - Functions
Aux. supply 230V Aux. supply 115V  (A)

HP

kW

 Sobrecarga-Overload  Falta_Fase-Phase_Loss_Imbalance

C9

11203

11202

3 – 9,3 2 – 5,5 1,5 – 4

✓ 

C21

11223

11222

9 – 21,6 7,5 – 12 5,5 – 9

✓ 

✓ 

C45

11243

11242

20 – 45,2 15 – 30 11 – 22

✓ 

Applications

This relay is especially applicable to protect motors which need dependable and accurate protection relays for every type of start (trip classes 10, 20 and 30):

  •     Motor Control Centre (MCC)
  •     Pumps
  •     Compressors
  •     Ventilators
  •     Centrifugal Machines
  •     Conveyor Belts
  •     Cranes
  •     Valves
  •     Air conditioning
  •     Machine Tools
  •     Etc.

Technical Parameters

Termal memory / Overload Trip Yes/From  1,1 x IB
Maximum Motor Nominal Voltage 100 Vac
Trip Clases (IEC 947-4-1) 10-20-30
Phase Imbalance Protection Over 40% tripping time <3s
Reset Mode Manual and Remote
Signalling LED’s 3 LED’s
Output Contacts 1 relay with 1 NO + 1 NC
Switching Power Ith: 5A; AC15 – 250V -2A; DC13 – 30V – 2A
Terminals: Max. section / screw torque 2,5 mm2, No. 22 – 12AWG  / 20Ncm, 1,8 LB – IN
Power Consumption C9: 6,5VA (230 Vac); 3VA (115Vac)/C21 – C45: 2,5VA
Protection degree / weight / mounting IP20 / 0,3 kg / DIN rail
Storage Temperature -30º / +70º
Operation Temperature / Max. Altitude -15º +60ºC / 1.000m ; -15º +50ºC / 3.000m
Standards IEC 255, IEC 947, IEC 801, EN 50081-2
  CE UL-US LISTED

Trip Curves

Cold curve: represents the performance of the relay without any previous current flow, first start. Warm curve: the tripping times decrease as the current flows, and are adapted to the motor heating condition based on the thermal memory, the warm condition (IEC-255) is reached after a current of 0.9 x IN (motor rated current) flows during 2 hours approximately.

Connections

 

External Display

  • Optional display module
  • Size of 22mm push button
  • Mounted externally, on the panel door or a draw-out unit in a motor control centre (CCM)
  • Connected to the relay by a flat cable L= 2 meters
  • Diagramas conexiones cThe module has the appropriate LED’s to signal the trip cause and a reset push-button.

Dimensions

Accessories

CURRENT TRANSFORMERS CT
  • Up tp 1000 A of primary current
  • Transformeres ratio …/5
  • Sealable connection terminal box, metal brackets for fitting and bus-bar holders included

Support

Relays Motor C-GL Instructions

English instructions / Instrucciones Español / Deutsch Anweisungen / Français instructions /Instrukcja Polsk / Istruzioni Italiano /  Instalaçao Português

Motor Relay C Data-Sheet

For motors of low and medium power in several applications such as compressors, ventilators, surface mounted pumps, conveyor belts, machine tools, and in general to protect motors which need dependable and accurate protection relays for every type of start.

General Catalogue Low Voltage

Electronic Protection & Control of Motors, Generators and Pumps, Control & Measurement, Earth Leakage Protection, Surge Protection, Brandlabeling & Custom products.