ABB CVQ Manual

ABB Automation Inc.
Substation Automation and Protection Division
Coral Springs, FL 33065
Instruction Leaflet
All possible contingencies which may arise during installation, operation or maintenance, and all
details and variations of this equipment do not purport to be covered by these instructions. If further
information is desired by purchaser regarding this particular installation, operation or maintenance
of this equipment, the local ABB Power T&D Company Inc. representative should be contacted.
Printed in U.S.A.
CAUTION
!
Before putting relays into service, remove all
blocking which may have been inserted for the
purpose of securing the parts during shipment.
Make sure that all moving parts operate freely.
Inspect the contacts to see that they are clean
and close properly. Operate the relay to check the
settings and electrical connections.
1.0 APPLICATION
These relays have been specially designed and
tested to establish their suitability for Class 1E appli-
cations in accordance with the ABB Power T&D Com-
pany program for Class 1E Qualification Testing as
detailed in bulletin STR-1.
“Class 1E” is the safety classification of the electric
equipment and systems in nuclear power generating
stations that are essential to emergency shutdown of
the reactor, containment isolation, cooling of the
reactor, and heat removal from the containment and
reactor, or otherwise are essential in preventing sig-
nificant release of radioactive material to the environ-
ment.
Relay Style Internal Schematic
1339D96A01 3526A50
1339D96A02 3528A01
1339D96A03 3533A31
2.0 CONSTRUCTION AND OPERATION
The Class 1E relay uses the same type wire for
interconnecting operating units as does the com-
mercial type relay. This wire is irradiated polyolefin
insulation and does not contain PVC. A special
slow-operate-slow-release telephone type relay is
used to provide greater security against malfunction
due to seismic vibration. See internal schematics
3526A50, 3528A01 and 3533A31. Also, the disc unit
contains a special shield covering the spring located
above the disc.
3.0 CHARACTERISTICS
The characteristics are the same as described in I.L.
41-223 except the T1 relay adds additional time delay
and a burden of 3.1 volt-amperes at 125 volts dc
nominal. Seismicly rated contacts are both opened
and closed T2 contacts and opened CV contacts.
Closed CV contacts are seismicly rated only when
the ICS contacts are allowed to seal around them.
41-223.1C
Effective: August 1998
Supersedes I.L. 41-223.1B, Dated July 1998
( | ) Denotes Change Since Previous Issue
Type CVQ Relay
(Class 1E Applications)
These instructions are to be used in conjunction with I.L. 41-223 and differs only as indicated for
Type CVQ Class 1E relay applications.

I.L. 41-223.1C
2
CVQ Relay
( Class 1E Applications)
4.0 SETTINGS
Settings are the same as I.L. 41-223 except the min-
imum recommended time dial setting is the No. 1
position. Delete any reference to the 0.5 time dial
setting.
5.0 INSTALLATION
Installation is the same as I.L. 41-223 except use
only semi-flush mounting. A projection mounting
should not be used.
6.0 ADJUSTMENTS AND MAINTE-
NANCE
Acceptance Check
Use appropriate internal schematic 3526A50,
3528A01 or 3533A31 for establishing the test circuit
otherwise similar to I.L. 41-223. These test instruc-
tions apply except pickup time of T2 should also be
checked. This should be 150 to 200 milliseconds
which includes operate time of both T1 and T2.
Routine Maintenance
Class 1E relays should be inspected periodically and
the time of operation should be checked at least
once every year or at such other time intervals as
may be dictated by experience to be suitable to the
particular application. These checks should catch
any component failures which occur on a random
basis.
All contacts should be periodically cleaned. A con-
tact burnisher Style #182A836H01 is recommended
for this purpose. The use of abrasive material for
cleaning contacts is not recommended, because of
the danger of embedding small particles in the face
of the soft silver contact, thus impairing the contact.
Calibration
Instructions in I.L. 41-223 apply except for the test
diagram exceptions previously listed under Accep-
tance Check. Note that the special spring shield that
covers the spring on this relay may be removed for
making spring adjustments and then reassembled.
To remove the spring shield, requires that the damp-
ing magnet be removed first. The screw connection
holding the lead to the moving contact should be
removed next. The second screw holding the moving
contact assembly should then be loosened NOT
removed.
This screw terminates into a nut held captive
beneath the molded block. If screw is removed,
difficulty will be experienced in the re-assembly
of the moving contact assembly.
Slide the spring shield outward and remove from
relay. Tighten the screw holding the moving contact
assembly to the molded block.
ELECTRICAL CHECKPOINTS ~
TROUBLESHOOTING
Instructions in I.L. 41-223 apply.
CAUTION

I.L. 41-223.1C
3
CVQ Relay
(Class 1E Applications)
Figure 1: Relay Type CVQ Negative Sequence and Undervoltage Relay with Telephone Relay in FT-31 Case
Figure 2: Relay Type CVQ Negative Sequence and Over and Undervoltage Relay with Telephone Relay in FT-31 Case
Sub 3
3526A50
Sub 3
3528A01

Printed in U.S.A.
ABB Automation Inc.
4300 Coral Ridge Drive
Coral Springs Florida 33065
TEL: [phone]
FAX: [phone]
visit our website www.abbus.com/papd
I.L. 41-223.1B CVQ Relay
(Class 1E Applications)
Figure 3: Relay Type CVQ Negative Sequence and Undervoltage Relay with Telephone
Relay in FT-31 Case (330 Vdc/Trip Ckt)
Sub 2
3533A31