077-05FA-LSRL-C7 Tyco Electronics, 077-05FA-LSRL-C7 Datasheet - Page 11

• Manufacturer Part Number: 077-05FA-LSRL-C7
• Description: Current Meter
• Manufacturer: Tyco Electronics

Specifications of 077-05FA-LSRL-C7

• Meter Function: AC Ammeter
• Current Meter Range: 0-200A
• Meter Shape: Square
• Barrel Size: 4"
• Display Accuracy ±: 1%
• Lead Free Status / RoHS Status: na

070 Series ANSI Switchboard Meters
A.C. Wattmeters & Varmeters
The Crompton 70 series of A.C. Wattmeters and Varmeters incorporate a DC moving
coil taut band indicator with the Crompton designed micro-circuit Watt transducer
PCB to read power on single phase or three phase systems. Varmeters can be
supplied with internal phase shifter or with external phase shifter if preferred. In the
interest of standardisation, preferred Wattmeter scale marking for common current
and voltage transformers are listed on the following pages. Instruments may be
supplied with zero left or center zero scales at the same list price.
Scaling
Since Wattmeter and Varmeter current circuits are frequently connected in series,
they should have equal current carrying capacity. This means that to assure equality
the sum of the left and right end-scale values of the Varmeters should be equal to or
greater than the full scale value of the Wattmeter (or the higher of the end-scale
values if center or offset zero). Instruments 10,000 kilowatts and over are marked in
megawatts. Center zero or offset zero Watt and Varmeters are marked “IN” for left
deflection and “OUT” for right deflection. Preferred scales may be calculated for
Wattmeters and varmeters not listed on the charts. Scale Watts must be one of the
standard full scale dial markings shown on the charts.
Calibration
For full load value of Watts or Vars, assuming unity power factor:
1ph 2 wire Watts = amps x volts
3ph 3 wire Watts = amps x line to line volts x √3
3ph 4 wire Watts = amps x line to neutral volts x 3
Minimum scale values are obtained by multiplying resultant Watts using above
formula x 0.7 and selecting next highest standard scale.
For maximum scale value multiply x 1.3 and select next lowest standard.
If scale calculates to an exact listed value use it rather than the next higher or
lower value.
Note: When ordering Wattmeters and Varmeters specify C.T. ratio, V.T. ratio and
required scale.
Specification
Burden per element:
Accuracy Class:
Ambient range:
Ambient influence:
Overloads-current:
Voltage:
Voltage influence:
Power Factor influence:
Enclosure code:
Response Time:
Dielectric test:
40
Current circuit: 2VA
Voltage circuit: 1VA
1.0
0° to +60°C, (32° to 140°F) standard calibration 20°C (68°F)
0.05% per 1°C maximum
10 x rating for 5 seconds., 1.2 x continuously
2 x rating for 5 seconds., 1.2 x continuously
Accuracy maintained, 80-110% rated voltage
Accuracy maintained 0.1 lag to 0.1 lead
077: IP54 optional IP55
078: IP67
079: IP54 optional IP55
077,078: approximately 2.5 seconds
079: approximately 3.5 seconds
Live parts to case including panel 2600V RMS for 1 minute