D3-CMA2-1

2 RELAY

This device provides OVER and / or UNDER current protection. The display may be scaled to any value from 5 to 5000 and the decimal pointer set to any position. This allows the device to be configured for any primary CT current with up to 3 decimal places. Each relay is controlled via separate upper, lower and hysteresis set-points. The relays may therefore be configured for both over and / or under, or one for over and the other for under current protection. Programmable ‘start-up’ and ‘reaction’ delays are included. 

ADDITIONAL FEATURES INCLUDE:

• adjustable RESOLUTION by adjusting the position of the decimal point and scale
• adjustable HYSTERESIS (DIFFERENTIAL)
• START-UP DELAY: allows the current to stabalize at startup before monitoring starts
• REACTION DELAY: prevent tripping for a pre-set time period
• LATCH facility: to force manual reset after fault
• LATCH can be enabled / disabled for each relay independantly (used when one relay is alarm relay)
• independantly invert relay action, ie close while in fault condition
• keypad lock with code

ADJUSTABLE PARAMETERS:

SCALE : 1A - 9999A

DECIMAL POINTER : 0.000 / 0.00 / 0.0 / 0

UPPER LIMIT : 1A - full scale

LOWER LIMIT : 1A - full scale

HYSTERESIS: 1A - full scale

START-UP DELAY: 0 - 99 seconds

REACTION DELAY (TRIPP DELAY): 0 - 99 seconds

CALIBRATION: 90% - 110%

RESPONSE TIME :<1-4 sec

ACCURACY:

 0.25%

Specifications:
Accuracy:                             1% of full scale (sinusoidal inputs) Typically 0.5% at 25 °C.
Scale:                                   5 to 5000
Peak instantaneous current: 5A device: 8A
Full wave:                             8/e2=5.65A RMS.
Half wave:                            8A/2=4A RMS
1A device:                            1.6A
Full wave:                            1.6A/e2=1.13 A RMS.
Half wave:                            1.6A / 2=0.8A RMS)
Input voltage:                      ±15% of rated voltage
Led indication:                      Relay status
Response time:                     <1.1 sec
Start-up delay:                      1 to 100 sec (0.5 sec intervals)
Reaction delay:                      0 to 100 sec (0.5 sec intervals)

Download User Manual Here