Page top

Lead Contents

FAQ01574 of Measuring / Motor Protective Relays FAQ

FAQ No. FAQ01574

Primary Contents

Question

Can you connect the K2CU Heater Element Burnout Detector's control power supply from a circuit other than the heater circuit?

Answer



The control power supply for the K2CU is generally the same as the heater circuit power supply.

Explanation:

The K2CU Series consists of two types of Heater Element Burnout Detector: one without gate input terminals and one with gate input terminals, as described below.

1. Detectors with Gate Input Terminals (K2CU-F[][]A-[], K2CU-P)

Synchronization must e made with Solid State Relays and magnet contactors for heater control.
The same power supply must be therefore be used.

The following table lists the models without gate input terminals.
Large-capacity Detectors with Built-in CTs (K2CU-F)

Control power
supply voltage
Operating current4 to 10 A AC8 to 20 A AC16 to 40 A AC32 to 80 A AC
100 VACVoltage fluctuation
correction provided
K2CU-F10A-CK2CU-F20A-CK2CU-F40A-CK2CU-F80A-C
110 VACK2CU-F10A-DK2CU-F20A-DK2CU-F40A-DK2CU-F80A-D
200 VACK2CU-F10A-EK2CU-F20A-EK2CU-F40A-EK2CU-F80A-E
220 VACK2CU-F10A-FK2CU-F20A-FK2CU-F40A-FK2CU-F80A-F

Small-capacity Plug-in Detectors (K2CU-P)

Control power
supply voltage
Operating current0.25 to 0.5 A AC0.5 to 1 A AC1 to 2 A AC2 to 4 A AC
100/200 VACVoltage fluctuation correction
provided
K2CU-F0.5A-AK2CU-P1A-AK2CU-P2A-AK2CU-P4A-A
No voltage fluctuation correction---K2CU-P1-AK2CU-P2-AK2CU-P4-A
110/220 VACVoltage fluctuation correction
provided
K2CU-F0.5A-BK2CU-P1A-BK2CU-P2A-BK2CU-P4A-B
No voltage fluctuation correction---K2CU-P1-BK2CU-P2-BK2CU-P4-B

2. Detectors with Gate Input Terminals (K2CU-F[][]A-[]GS)

All models with gate input terminals are equipped with a voltage fluctuation correction function. Because this function corrects the standard value of the internal setting circuits, if it does not use the same power supply, errors will occur in the operating values due to fluctuations in the control power supply voltage. This is why the same power supply must be used.

The following table lists the models with gate input terminals.
Models with gate input terminals (K2CU-F[][]A-[]GS)

Control power
supply voltage
Operating current4 to 10 A AC8 to 20 A AC16 to 40 A AC32 to 80 A AC
100 VACVoltage fluctuation
correction provided
K2CU-F10A-CGSK2CU-F20A-CGSK2CU-F40A-CGSK2CU-F80A-CGS
110 VACK2CU-F10A-DGSK2CU-F20A-DGSK2CU-F40A-DGSK2CU-F80A-DGS
200 VACK2CU-F10A-EGSK2CU-F20A-EGSK2CU-F40A-EGSK2CU-F80A-EGS
220 VACK2CU-F10A-FGSK2CU-F20A-FGSK2CU-F40A-FGSK2CU-F80A-FGS

Note:When combining a PID-control Temperature Controller with a heater's temperature control system, a Detector with gate input terminals must be used. In this case, also use a Temperature Controller with a voltage output.

Recommended Products

S8VS

New Models with Indication Monitor and Simple Functions for Easy System Commissioning

ZJ-FA20

High-speed, High cost performance Ionization

S8JX

Flexible Selection of Reliability and Ease of Operation with the S8JX. New Models with Harmonic Current Suppression for a Broader Lineup.

Other Measuring / Motor Protective Relays FAQ