Texas Instruments Klixon 2ACE Series User manual

2ACE Series
Installation and Operating
Instructions
ŸFollow all local electrical and safety codes, as well as the National Electrical Code
(NEC) and the Occupational Safety and Health Act ( OSHA).
ŸLock and tag the power disconnect to prevent unexpected application of power.
ŸSelect the proper size wire, according to the NEC and installation for passing
through wire through the 2ACE module.
ŸControl voltage and frequency must not exceed the 2ACE electrical rating.
ŸSupply Voltage, 24 VDC or 24VAC. Operating frequency rating is 50/60Hz, only.
ŸFor safety, a lockable disconnect switch should be located near the device being controlled so that the power can be positively disconnected while
servicing the units. Do not rely on a time switchÕs manual lever to disconnect power while servicing the equipment. Do not exceed the 2.5 Amp,
250VAC rating for the control circuit connected to terminals M1 and M2. ( See Specifications)
ŸRemove all voltages before making any connections. The 2ACE may be installed on the line or load side of the compressor or motor contactor.
Wiring Diagram:
Texas Instrument Incorporated
Materials & Controls Division
34Forest St., MS 2-3
Attleboro, MA 02703-0964
Phone: [phone]
Fax: [phone]
http://www.ti.com/mc
General Safety Information:
Wy e

7-segment
Display Code Fault information Troubleshooting Information
1 Current overload 1) Check MH calibration setting
2,3,7 Current Unbalance 1) Possible high resistance connection caused by an open circuit condition for a
motor phase.
4 Phase reversal
1) Phase wiring is installed wrong.
2) Operating frequency for phase current is below 35Hz.
5 Over Temperature
1) Open or loose connection on sensor wiring.
2) ÒCÓ terminal mis-wired to one of the sensor channels.
6 Calibration Error
1) Calibration setting is either <25A or > 225A setting.
2) Calibration setting was changed after power was applied to supply voltage.
8 Phase Loss 1) Possible high resistance connection caused by an open circuit condition for
a motor phase.
Operation:
1). While compressor/motor is off, and no current is being sensed, the 7-segment display will slowly f lash the format
HAxxx, where xxx= MH rating. For example, HA125 = Must Hold. Please see step 7 of the installation section for
information on setting the calibration for current overload.
2). When the compressor/motor is on and current is being sensed, the 7-segment display will flash a rotating Ò0Ó to
indicate the 2ACE has detected motor current greater than 10 Amp and the motor temperature and current being
monitored are within normal operating conditions.
3). If mis-wired, the phase reversal protection will de-energize the control circuit output within the one second of
operation. (Caution: phase reversal is not provided when motor current is below 10Amp)
4). When the 2ACE protector recognizes a trip condition, its control relay (M1, M2) will open. Following a trip
condition, power must be maintained on T1, T2. Automatic power off w ill result in the elimination of the fault codes
indicated on the fault display.
5). The 2ACE series has low voltage
protection, but it will automatically
reset when rated voltage is present.
6). All overloads which result from
current measurement or temperature
sensor inputs require a power off
reset.
7). Refer to the table at the right if a
fault condition is indicated by the
2ACE module that cannot be
confirmed in the compressor/motor.
Installation:
1). Before you begin installation measure the line & control voltages to ensure they are correct for the equipment to be
operated. See Specifications and Wiring Diagram for reference.
2). The control terminal M1should be connected to the common side of each contactor coil. M2 should be connected to
the actual common of the contactor control supply. Consider all terminals to present a shock hazard if the line voltage
is used for the control voltage. Do not exceed the 2.5 Amp, 250VAC rating for the control circuit connected to
terminals M1 and M2.
3). Connect the motor winding thermistor wiring to the corresponding terminals designated as C, S1, S2, S3. Terminal
ÒCÓ is not common and is +5 volt rail for thermistor interface.
4). If applicable, connect the current transducer output to terminals designated as ÒBÓ and ÒGÓ. Terminal ÒGÓ is
electrically at the same potential as T1. The label shows the hidden line connections between these two terminals.
5). Connect the control voltage wiring to the terminals designated at TI and T2. Please note that T1 is the lower
electrical potential with respect to terminal T2. Keep power off until the 2ACE is properly calibrated and connected to
all wiring. Control Voltage rating is 24VDC or 24VAC.
6). Pass phase ÒAÓ through 2ACE orifice designated on top label as ÒAÓ. Repeat for phases ÒBÓ and ÒCÓ. Operating
frequency is limited to 50/60Hz.
7). Adjust the Must Hold (MH) amperes
by selecting the corresponding DIP
switches such that they add together to
equal the MH ratings for the leads passing
through the module. Consult
compressor/motor manufacturer for
MH hold calibration setting. These may
vary with motor wiring selections.
8). Apply power to supply voltage at T1
and T2. (24VDC or 24VAC)
Units Minimum Typical Maximu
m
Operating Temperature Range o
C -40 - +70
Supply Voltage
(Rated 24 VAC at 0.240 A Lo
a
Vac 18 24 30
Rated Line Frequency Hz 45 50/60 62
Low Voltage Cut-Out Trip Vac 15 16 17
Low Voltage Cut-In Reset Vac 18
Low Voltage Response Time
(Supply 100% to 50%)
Sec 0.150 0.200 0.250