Effective 7/1/2003
Page 26
I.L. 70C1037H04
5.3.2 Functional Test Kit (handheld)
5.3.2.1 Description of Handheld Test Kit
A battery powered test kit is also available and capable of
testing trip elements for Digitrip units 520/520M/520MC
and Digitrip 220+, including power up, Instantaneous Trip,
Short Delay Trip, and Ground (Earth) Fault Trip. These test
selections are chosen with the switch labeled “Select Test”
located in the upper right hand corner of the Test Kit
(See
Figure 5.1).
The test currents are not adjustable for this
test kit.
The Style number of this device is # 70C1056
5.3.2.2 Test Procedure
Complete procedural instructions for the Cutler Hammer
Functional Test Kit can be found in I.L. # 5721B13 which is
packaged which is packaged with each test kit.
Figure 5.1 Functional Test Kit
NOTE:
After completion of testing, perform a Power-Up by
depressing Reset pushbutton which will clear the trip
memory. Disconnect cable from Test Kit to prevent acci-
dental operation and battery drainage. Reset the Instanta-
neous setting to its original condition. Reposition the LTM
jumper to the as-found condition. Install the small cover on
the Digitrip and install the breaker’s plexiglass cover.
5.3.2.3 Currents
Each test selected by the Select Test switch on the Test
Kit supplies a fixed milliampere current value. The Long
Delay Setting will affect the per unit (Ir) current value and
the response of the Digitrip unit.
5.3.2.4 Batteries
The Functional Test Kit contains a total of seven 9-Volt
batteries. A Lithium Ion cell is the preferred battery type for
BAT A and is attached to the main pc board of the Test Kit.
This battery has a much longer life span to accurately
perform the selected tests. The remaining six batteries are
located on a separate board in the Test Kit and serve to
power up the display on the 520M trip unit.
LED’s A and B function to represent sufficient battery
voltage from both the single Lithium cell and the six
Alkaline batteries, respectively. If either LED does not light
or lights only dimly, replace the appropriate battery or
batteries within the Functional Test Kit case. To do this,
open the back of the case using a screwdriver and remove
the battery or batteries from their respective locations. For
best results, replace Lithium battery (Battery A) with
ULTRALIFE
®
U9VL Battery. When replacing battery six-
pack (Battery B), replace all batteries at the same time
using standard 9V alkaline batteries.
5.4 Performance Testing for Ground Fault Trip Units - Primary
Injection
5.4.1 Code Requirements
The NEC, under Article 230-95-C, requires that any ground
fault protection system be performance tested when first
installed. Conduct tests in accordance with the approved
instructions provided with the equipment. Make a written
record of this test and make the results available to the
authority having inspection jurisdiction.
5.4.2 Standards Requirements
As a follow-up to the basic performance requirements
stipulated by the NEC, UL Standard No. 1053 requires that
certain minimum instructions must accompany each
ground fault protection system. These statements
(Section
5.4.3)
, plus a copy of the record forms
(Figures 8.1, 8.2,
and 8.3),
are included as part of this Instructional Leaflet.
5.4.3 General Test Instructions
The interconnected system must be evaluated only by
qualified personnel and in accordance with the equipment
assembler’s detailed instructions.
To avoid improper operations following apparently correct
simulated test operations, the polarity of the neutral sensor
connections (if used) must agree with the equipment
assembler’s detailed instructions. Where a question
exists, consult the specifying engineer and/or equipment
assembler.
