Miniature Adjustable Current Switches
Installation and Operation
#NSA-A/MCS-A, NSA-A/MSCS-A
– 11/14/2019
Specifications subject to change without notice.
Catalog No. 11-808-762-01
Page
3
of
5
Installation
Warnings
This product is not intended to be used for Life or Safety applications.
This product is not intended for use in any hazardous or classified locations.
Disconnect and lock out all power sources before installation as severe injury or death may result from electrical
shock due to contact with high voltage wires.
Never rely on the LED’s to determine whether power is present at the current switch. The Red LED indicates whether
the current is above the adjustable trip point. The Blue LED will indicate that the current is below the adjustable trip
point.
All installations must be in compliance with all national and local electrical codes. Only qualified individuals that are familiar
with codes, standards, and proper safety procedures for high-voltage installations should attempt installation. The current
switches will not require external power, since the power for the current switch is induced from the conductor being
monitored.
The NSA-A/MCS-A and NSA-A/MSCS-A Current Switches should be used on
Insulated Conductors Only! The current switch may be mounted in any position
using the (2) #8 x 3/4” Tek screws and the mounting holes in the base. Leave a
minimum distance of 1” (3 cm) between the current switch and any other
magnetic devices such as contactors and transformers.
For applications in which the normal operating current is below the 0.32Amps
(NSA-A/MCS-A) or 0.70Amps (NSA-A/MSCS-A) trip point (See Figure 3 below),
the conductor being monitored may be looped through the sensor 6 times giving
you a total operating current of 6X the original current.
Example
: A small fan
operating at 0.2A should be wrapped through the sensor 7 times to give you a
total operating current of 1.4Amps flowing through the NSA-A/MCS-A or NSA-
A/MSCS-A.
Figure 2
Figure 3
