K2CU-F20A-C AC8-20A AC100 Omron, K2CU-F20A-C AC8-20A AC100 Datasheet - Page 12

• Manufacturer Part Number: K2CU-F20A-C AC8-20A AC100
• Description: HEATER FAULT DETECTOR
• Manufacturer: Omron
• Series: K2CUr

Specifications of K2CU-F20A-C AC8-20A AC100

• Current Rating: 8.0 ~ 20 A
• Mounting Type: Panel
• Operational Type: Large, Built in Transformer
• Voltage - Supply: 100 VAC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Gate Input: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: K2CU-F20A-CAC8-20AAC100; K2CUF20ACAC820AAC100

Safety Precautions
K2CU-F@@A-@GS
Use the K2CU-F@@A-@GS (with gate input terminals) in combina-
tion with a temperature controller that has PID with feed-forward cir-
cuitry to control the heater temperature, in which case, the heater
element(s) must be turned ON or OFF for 0.1 s or longer.
K2CU-F
When a single-phase heater is used, pass the two lines through the
openings of the heater burnout detector. When a three-phase heater
is used, pass two (phases) of the three lines through the openings. In
either case, if only one line passes through, an alarm signal will
always be produced.
Pass the lines through the openings only once. If they are passed
more than once, the actual operating current will be less than the set
current. The lines can be passed in either direction.
To use the heater burnout detector at a current less than the current
range that can be set, the lines must be passed more than once.
Determine the number of times the lines should be passed by the fol-
lowing equation:
(Operating current) x n = Current setting range
where,
n: number of times the lines loop through the window
All K2CU-F models incorporate a voltage fluctuation compensation
function.
K2CU-P
The K2CU-P can be used only in single-phase circuits.
Do not pull out the K2CU-P from the socket when the K2CU-P is
energized. Especially when using it in combination with a Current
Transformer commercially available, this practice causes the second-
ary circuit of the transformer to open, which is very dangerous.
General
Refer to External Connections before using the K2CU with external
CTs.
When a temperature controller is used in combination with the K2CU
(except for the K2CU-F@@A-@GS), the heater element(s) must be
turned ON or OFF for 1 s or longer (although the heater element(s)
can be turned ON for 0.5 s according to the specifications).
The K2CU cannot be used with a phase-control circuit, inverter cir-
cuit, frequency-count circuit, cycle-control unit, or a motor load.
Mounting
Securely mount the K2CU as horizontally as possible although there
is no particular limitation of mounting directions.
Connection
Solderless-type terminal must be connected to the terminals
securely.
Wire the terminals correctly by referring to the external connections.
The terminals have no polarity. Be sure to connect 100 (or 110) V to
the 100-V (or 110-V) terminals and 200 (or 220) V to the 200-V (or
220-V) terminals of the K2CU-P or the K2CU-P may malfunction.
The control power source for the K2CU (except for the K2CU-F@@A-
@GS) must be supplied from the load side via a contactor.
Be sure to impose a voltage between the 0-V terminal and 100-V (or
110-V) terminal or the 0-V terminal and 200-V (or 220-V) terminal of
the K2CU-P, otherwise the K2CU-P will not operate.
With three-phase
power supply
http://www.ia.omron.com/
Heater
With single-phase
power supply
Heater
(c)Copyright OMRON Corporation 2008 All Rights Reserved.
K2CU
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