Megger OCR15D User manual

1 Part Number 86826
Rev 1 Date 11/6/2019
User Manual
Model OCR15D
and
Model OCR50D
AUTOMATIC CIRCUIT RECLOSER
TEST SETS
It is essential that this instruction book be read thoroughly before putting the equipment in service.

2 Part Number 86826
Rev 1 Date 11/6/2019
Revision History
Revision
ECN #
Date
1
33728
6 Nov 2019

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IMPORTANT
This manual, as well as the hardware and software described in it, is furnished under license and
may be used or copied only in accordance with the terms of such license. The content of this
manual is furnished for informational use only, is subject to change without notice. Megger
assumes no responsibility or liability for any errors or inaccuracies that may appear in this
manual.
The information and data in this User Manual are proprietary. The equipment described herein
may be protected by U.S. patents. Megger specifically reserves all rights to such proprietary
information as well as rights under any patent, none of which is waived by the submission of this
user manual.
Except as permitted by such license, no part of this publication may be reproduced, stored in a
retrieval system, or transmitted, in any form or by any means, electronic, mechanical, recording,
or otherwise, without the prior written permission of Megger.
Megger, the Megger logo are trademarks of Megger. All other trademarks are the property of
their respective owners.
Notice to U.S. government end users. The hardware, software and documentation are
“commercial items”, as that term is defined at 48 C.F.R. §2.101, consisting of “commercial
computer software” and “commercial computer software documentation,” as such terms are used
in 48 C.F.R. §12.212 or 48 C.F.R. §227.7202, as applicable. Consistent with 48 C.F.R. §12.212
or 48 C.F.R. §§227.7202-1 through 227.7202-4, as applicable, the commercial computer software
and commercial computer software documentation are being licensed to U.S. government end
users (1) only as commercial items and (2) with only those rights as are granted to all other end
users pursuant to the terms and conditions set forth in the Megger standard commercial
agreement for this software and hardware. Unpublished rights reserved under the copyright laws
of the United States. The recipient, if a Government agency, acknowledges that this manual and
the equipment described were procured with "Limited Rights" to technical data as described in
ASPR 9-203 (b).
The STVI includes an RTOS-resident computer program. This program belongs to Megger and
contains trade secret ideas and information of Megger.
Written and designed at Megger, 4271 Bronze Way, Dallas, Texas 75237.
__________________________
Printed in the USA.
2011 Megger, all rights reserved.

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SAFETY PRECAUTIONS
WARNING:
VOLTAGES GENERATED BY THIS INSTRUMENT CAN BE HAZARDOUS
This instrument has been designed for operator safety; however, no design can completely protect
against incorrect use. Electrical circuits are dangerous and can be lethal when lack of caution and
poor safety practices are used. There are several standard safety precautions that should be taken by
the operator. Where applicable, IEC safety markings have been placed on the instrument to notify
the operator to refer to the user manual for instructions on correct use or safety related topics. Refer
to the following table of symbols and definitions.
Symbol
Description
Direct Current
Alternating Current
Both direct and alternating current
Earth (ground) Terminal. There is a common chassis ground terminal located
on the front panel (see Front panel under Description of Controls.
Protective Conductor Terminal
Frame or Chassis Terminal
On (Supply)
Off (Supply)
Caution, risk of electric shock
Caution (refer to accompanying documents)
WARNING: Under no circumstances should the operator or technician attempt to open or
service any Megger instrument while connected to a power source. Lethal voltages are present
and may cause serious injury or death!

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SAFETY PRECAUTIONS (Continued)
The following are some specific safety related items associated with the OCR test
systems.
Read and understand all safety precautions and operation instructions before attempting
to use this unit.
This test set should only be operated by specifically trained technicians and engineers
familiar with this type of industrial electrical equipment.
The purpose of this equipment is limited to use as described in this instruction manual.
Should a situation arise that is not covered in the general or specific safety precaution
please contact Megger regional representative or Megger, Dallas Texas.
Safety is the responsibility of the user. Misuse of this equipment can be extremely
dangerous.
Always start with the main power OFF, before connecting the power source.
Make sure outputs are off before attempting to make test connections.
Never connect the test set to energized equipment.
Always use properly insulated test leads. The optional test leads are rated for
the continuous output ratings of the test system, and should be properly used
and cared for. DO NOT use cracked or broken test leads.
Always turn the test system off before disconnecting the power cord.
DO NOT attempt to use the unit without a safety ground connected.
DO NOT attempt to use the unit if the power cord ground prong is broken or
missing.
DO NOT use the test set in an explosive atmosphere.
The instrument must only be used by suitably trained and competent persons.
Observe all safety warnings marked on the equipment.
For safety related or other important topics, like the statement below, will be
notated with the adjoined symbol. Read the topic carefully as it may relate
either to the safe operation of the test system or the safety of the operator.
Under no circumstances should the operator put their hand or tools
inside the test system chassis area with the test system connected to a
power source. Lethal voltages are present and may cause serious
injury or death!

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This test set includes a resident computer program.
This program belongs to Megger and contains trade secret ideas and information of Megger.
To the extent this program contains ideas, Megger intends to protect and enforce it rights under state law.
To the extent the program is deemed to constitute a form of expression of an idea, Megger intends to
protect and enforce its rights under the Copyright Act of 1976. The Statutory Copyright notice has been
affixed hereto in the event that it is later determined that the program has been published within the
meaning of the Copyright Act of 1976.
It is essential that this instruction book be read thoroughly before putting the equipment in service.

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TABLE OF CONTENTS
I. General Description
II. Safety Precautions
III. Input Circuit
IV. Output Circuit
V. Description of Controls
VI. Test Procedures
A. Series Type Reclosers
1. Minimum Pick-up Test
2. Timing Test
B. Testing Vacuum Type Reclosers
C. Reclosers Requiring Line Voltage for Closing
D. Sectionalizers

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I. GENERAL DESCRIPTION
The Megger Model OCR15D and OCR50D are high current primary injection test
sets designed for testing automatic oil and vacuum circuit reclosers and other
current actuated devices. These units incorporate a variable high current ac output
with an impedance matching network to stabilize the output current. The unit
provides appropriate instrumentation and control circuitry to monitor contact
closure, opening and provide timing functions.
II. SAFETY PRECAUTIONS
WARNING
Potentially lethal voltages can be present on the output leads when the test
set is in operation. The operator is responsible for ensuring the safety of all
personnel during operations. While conducting tests, keep all personnel at a
safe distance from the test set and the device being tested.
CAUTION
For safety of the operator, it is absolutely essential that the test set be
properly and effectively grounded.

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III. INPUT CIRCUIT
INPUT VOLTAGE
OCR50D
Due to the output capability (50 kVA continuous for the OCR50D) as well as the
specific applications for which the test set was designed, the test set must be
powered by a 480 volt single-phase input service.
OCR15D
The Megger OCR15D (15 kVA continuous) is designed to operate from any of
several input voltages in order to accommodate the various voltages encountered
by users in the field. It is necessary to change the input terminal connections to
match the available input voltage. This change is made on a terminal board located
inside the right side access panel. The test set must be disconnected from the
supply source before attempting to change the terminals.
SELECTION OF INPUT LEADS
Due to the wide variation in individual user requirements with regard to wire sizes,
terminations and length of leads, all units are supplied with input socket and
matching plug only. The plug will accept a wide range of wire sizes more than
adequate for the duty required. The power source must have sufficient capacity,
and the input leads must be large enough to maintain RATED input voltage at the
INPUT terminals of the test set. Although the test set is designed to operate
satisfactorily at 95-105% of rated voltage, any drop in voltage below RATED at the
input terminals will result in a proportional decrease in the maximum available
output.
NOTE: To achieve published output currents, the rated input voltage must be
maintained at the test set terminals during the test.
When utilizing maximum output from the test set, the input line currents
may be as high as 400% of nameplate rating. The following table has
been prepared to aid in selecting the proper wire size for the input
leads. To use the table, refer to the following four steps:

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1. Determine the rated input current from the nameplate on the test set. Be sure
to choose the correct current for the input voltage being used.
2. Multiply this value by four.
3. Determine the length of input lead required. This is in circuit-feet, therefore it
is the one-way distance from the test set to the power source.
4. Select the proper wire size from the table using factors 2 and 3 above.
Input Lead Example:
Step 1 - 100 amperes (from nameplate)
Step 2 - 4 x 100 = 400 amperes
Step 3 - 60 ft. (distance from test to input power source.)
Step 4 - # 2 wire (from Chart)
For safety, a ground wire must be connected to the test set frame. The size
of this conductor should be not less than 1/2 the cross section of the
current carrying input leads (three-wire sizes less) and in no event smaller
than #10. An audible alarm is sounded if the test set is not properly
grounded.