Cutler-Hammer HWT-500 User manual

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Instructions for
Cutler-Hammer Type HWT-500
Network Protector
Portable Test Set
READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE ATTEMPTING
ANY MAINTENANCE OF THE NETWORK PROTECTOR
SEE IMPORTANT DISCLAIMER OF WARRANTIES AND LIMITATION OF LIABILITY ON
NEXT PAGE
Cutler-Hammer
2210 Highway 72/221 East
Greenwood SC 29649
Effective July, 2001

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DISCLAIMER OF WARRANTIES
AND LIMITATION OF LIABILITY
THERE ARE NO UNDERSTANDINGS, AGREEMENTS, REPRESENTATIONS OR
WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, OTHER THAN
THOSE SPECIFICALLY SET OUT BY AN EXISTING CONTRACT BETWEEN THE
PARTIES. ANY SUCH CONTRACT STATES THE ENTIRE OBLIGATION OF SELLER.
THE CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY
ANY PRIOR OR EXISTING AGREEMENT, COMMITMENT OR RELATIONSHIP.
The information, recommendations, descriptions and safety notifications in this
document are based on Cutler-Hammer’s experience and judgement with respect to
the HWT-500 TEST SET. THIS INFORMATION SHOULD NOT BE CONSIDERED TO BE
ALL-INCLUSIVE OR COVERING ALL CONTINGENCIES. If further information is
required, Cutler-Hammer should be consulted.
NO WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF
FITNESS FOR A PARTICULAR PURPOSE OR MERCHANTABILITY, OR WARRANTIES
ARISING FROM COURSE OF DEALING OR USAGE OF TRADE, ARE MADE
REGARDING THE INFORMATION, RECOMMENDATIONS, DESCRIPTIONS AND
SAFETY NOTATIONS CONTAINED HEREIN. In no event will Cutler-Hammer be
responsible to the user in contract, in tort (including negligence), strict liability or
otherwise for any special, indirect, incidental or consequential damage or loss
whatsoever including but not limited to damage to or loss of use of equipment, plant
or power system, cost of capital, loss of profits or revenues, cost of replacement
power, additional expenses in the use of existing power facilities, or claims against
the user by its customers resulting from the use of the information,
recommendations, descriptions and safety notations contained herein.
Please read instruction book I.B. 35-557 carefully before attempting to use the HWT-500.
Any questions regarding the HWT-500 Test Set or its instruction booklet may be answered by calling the
Cutler-Hammer Network Protector toll-free number: 1-800-525-6821.
Failure to follow instructions contained within the instruction booklet and addendum could result in severe
personal injury, death, and/or product or property damage and will void any warranties, expressed or implied.
These instructions do not purport to cover all possible contingencies that may arise during
installation, operation, or maintenance, and all details and variations of this equipment. If further
information is desired by purchaser regarding his particular installation, operation or maintenance of
his equipment, the local Cutler-Hammer representative should be contacted.

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Table of Contents Page Page
Introduction…………………………………… 4 GENERAL ELECTRIC
Safety Information…………………………… 5
Test Set Transportation……………………… 6 Individual Relay Test…………………… 28
General Operating Information……………… 7 CAN or CHN Master Relay Overvoltage
Close Test…………………………………
29
Control Panel Layout………………………… 8 CAN or CHN Master Relay Reverse
Current Trip Test…………………………
30
Overall Operational Test……………………… 12 PYC16 Delayed-Sensitive Trip Test…… 31
Overall Close and Trip………………………… 14 CAL or CHL Phasing Relay Overvoltage
Close Test…………………………………
32
SSNPR Close Test……………………… 33
WESTINGHOUSE SSNPR Trip Test………………………… 34
SSNPR Phase Detection Test………… 34
Individual Relay Test………………………… 16 Mechanism Components Test………… 36
CN-33 Master Relay Overvoltage Test…… 16 HWT-500 Maintenance and Repair…… 38
CN-33 Master Relay Reverse Current Trip
Test………………………………………………
17
Table 1 - Suggested Relay Settings…… 39
CN-33 Single Phase Reverse Current Trip
Test………………………………………………
19
Table 2 - Renewal Parts………………… 41
CNJ Phasing Relay Overvoltage Test……… 20
BN De-sensitizing Relay Time Delay Test..… 21
BN De-sensitizing Relay Instantaneous Trip
Test………………………………………………
22
Mechanism Component Test………………… 23
MPCR Solid State Relay Close Test………… 26
MPCR Solid State Relay Trip Test………… 27
MPCR Solid State Relay Phase Detection
Test………………………………………………
27

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INTRODUCTION
The Cutler-Hammer type HWT-500 universal, portable network protector test set has been
designed for use on network protector breakers of all amperage ratings, 60HZ, and in the
voltage class of 480 and 216.
It is designed for electrical and mechanical testing of any network protector breaker, or
selected component parts, on voltages from 208Y/120 to 480Y/277 volts, three phase, four
wire wye connected systems, or 480 volt, three phase, three wire delta systems.
The primary purpose of this test set is for routine testing of network protector breakers and
calibration of network relays and electrical components in the field. However, if a network
protector or a simulated network protector breaker is used with this test set, scales of the
digital meters on the test set are such that network relays can be calibrated at a service
center or laboratory.
NOTE
VOLTAGES AT SERVICE CENTERS OR LABORATORIES MAY NOT BE EQUIVALENT IN
VOLTAGE MAGNITUDE OR VOLTAGE BALANCE BETWEEN PHASES AS COMPARED TO
THE VOLTAGES FOUND IN MOST NETWORK LOCATIONS. MOST ELECTRO-MECHANICAL
RELAYS ARE VOLTAGE SENSITIVE DEVICES WHOSE CALIBRATED SETTINGS CAN BE
AFFECTED BY VARIOUS SYSTEM VOLTAGE LEVELS. DUE TO THIS FACT, WE
STRONGLY RECOMMEND THAT THE FINAL RELAY CALIBRATION OF ELECTRO-
MECHANICAL RELAYS BE PERFORMED USING THE SYSTEM VOLTAGE AVAILABLE AT
EACH NETWORK PROTECTOR LOCATION. HOWEVER, SOLID STATE RELAYS ARE
TYPICALLY NOT AFFECTED BY VOLTAGE FLUCTUATION AND ARE WELL SUITED FOR
LABORATORY CALIBRATIONS.

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SAFETY INFORMATION
WARNING
1. FAILURE TO FOLLOW INSTRUCTIONS CONTAINED HEREIN COULD RESULT IN
SEVERE PERSONAL INJURY, DEATH, AND/OR PRODUCT OR PROPERTY
DAMAGE.
2. ANY MECHANICAL OR ELECTRICAL MODIFICATION TO ANY NETWORK ROTECTOR
REQUIRES THAT THE NETWORK PROTECTOR BE GIVEN APPROPRIATE ELECTRICAL
TESTS, USING PROPERLY MAINTAINED TESTING DEVICES, BEFORE PLACING INTO
SERVICE. FAILURE TO PERFORM SUCH ELECTRICAL TESTS CREATES CONDITIONS
LEADING TO THE POSSIBILITY OF DEATH, SEVERE PERSONAL INJURY AND/OR
PROPERTY DAMAGE.
Keep this Instruction Book available to those responsible for the maintenance and operation of
network protectors. It should be consulted before any procedures are performed.
The installation, testing and maintenance of a network protector present numerous potential
unsafe conditions, including but not limited to, the following:
• Improper Operation
• Lethal Voltages
• Moving Parts
• Heavy Components
Specialized procedures and instructions are required and must be adhered to when working on
such apparatus.
WARNING
AFTER THE TEST SET HAS BEEN COMPLETELY CONNECTED AND IS IN OPERATION,
POTENTIALLY LETHAL VOLTAGES ARE PRESENT WITHIN THE NETWORK PROTECTOR
BREAKER AND WIRING HARNESS OF THE UNIT UNDER TEST. ENERGIZED
COMPONENTS ARE NOW EXPOSED.
PRIOR TO ENERGIZING THE NETWORK PROTECTOR BREAKER THROUGH THE TEST
SET, THE OPERATOR MUST MAKE CERTAIN THAT OTHER PERSONNEL IN THE AREA
MOVE A SAFE DISTANCE AWAY FROM THE UNIT UNDER TEST. FAILURE TO FOLLOW
THESE WARNINGS MAY RESULT IN DEATH, SEVERE PERSONAL INJURY AND/OR
PROPERTY DAMAGE.
BEFORE CONNECTING OR DISCONNECTING ANY OF THE TEST SET LEADS FROM THE
BREAKER OR THE SUPPLY, MAKE CERTAIN THAT THE TEST SET RED SUPPLY SWITCH
IS IN THE “OFF” POSITION.