FIGURE 4:
CURRENT TRANSFORMER
FIGURE 5:
DIGITAL CIRCUIT
FIGURE 6:
MOTOR/FAN CONTROL
Automation Components, Inc.
2305 Pleasant View Road | Middleton, WI 53562
Phone:
1-888-967-5224 |
Website:
workaci.com
Page 3
Version: 6.0
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600:5 Ratio 5A C.T.
Wire
For applications in which the normal operating current is greater than 150 Amps or for conductor diame-
ters larger than 0.530” (1.35 cm) in diameter, an external 5 Amp Current Transformer must be used as
shown in
Figure 4
below.
Remember that the secondary of the 5A CT must be shorted together before the power may be
turned onto the monitored device.
Example:
For currents up to 600 Amps (and not below 70 Amps (A/MCS-A) or 95 Amps (A/MSCS-A), where
Current Transformer (C.T.) secondary falls below 1 Amp use a 600:5 ratio C.T. as shown in
Figure 4.
RELAY
MOTOR
EXHAUST FAN
ACI SPLIT-CORE SWITCH
NEUTRAL
120 VOLT HOT
120 VOLT HOT
NEUTRAL
24 VAC HOT
NEUTRAL
MOTOR
RANGE HOOD FAN
APPLICATION EXAMPLES
See
Figure 5
(p.3) and
Figure 6
(p.3) for two different current switch applications.
Figure 5
(p.3) is showing
the use of the Mini Go/No Go Current Switch as a Digital Input to your BAS/PLC Controller.
Figure 6
(p.3)
shows a Mini Go/No/Go Current Switch in conjunction with a Contactor to control an exhaust fan.
Note:
The ACI Mini Adjustable Go/No Go Current switches(MCS-A & MSCS-A Series) are only rated at 1.0A
Continuous @ 36 VAC/VDC. These switches must use an additional Contactor if controlling motor/fans.
Building Management
Digital Input #1
System
