ABB CVQ Instruction Leaflet

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.

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

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

ABB Automation Inc. 4300 Coral Ridge Drive Coral Springs Florida 33065 TEL: 800-523-2620 FAX: 954-345-5329 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