Podcast
Questions and Answers
Which relay type is categorized as a Metal to Carbon Live Relay for AC immunized applications?
Which relay type is categorized as a Metal to Carbon Live Relay for AC immunized applications?
What is a characteristic of the Minor K-50 relays in terms of interlocking?
What is a characteristic of the Minor K-50 relays in terms of interlocking?
What is the voltage drop requirement across R18 R2 for the ECRs Relay?
What is the voltage drop requirement across R18 R2 for the ECRs Relay?
Which relay provides a time duration of 10 seconds for point operation?
Which relay provides a time duration of 10 seconds for point operation?
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What type of relays are classified as Non AC immunized Neutral Relays?
What type of relays are classified as Non AC immunized Neutral Relays?
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Study Notes
Relays
-
Series Relays:
- Metal to Carbon Live Relay (Non-AC, Immunized)
- Types: 6953, B3, QNN1
- Metal to Carbon Live Relay (AC Immunized)
- AC Immunized DC Neutral Line Relay
- QNA-1 Relay, QOB-1 Relay
- QBCA-1 Relay, QSPA-1 Relay, QJ-1 Relay
- Track Relay
- QT2, QTA2
- Timer Relay
- DC Thermal (CQT1), Electronic
- Metal to Carbon Live Relay (Non-AC, Immunized)
-
Siemens Metal to Metal Relays:
- K-50 Relays
- Group Relays
- Non-AC Immunized Relays
Interlocked Relays
-
AC Immunized Relays:
- Interlocked Relays (both top & bottom)
- Types: both top and bottom configurations
-
Metal to Metal Relays:
- Double coil relays used as ZIWRI, ZINWR, ZIRWR, WKR3, Z1WR, W2R
-
Universal ECR:
- 3F/3B relay (83.12Ω), two configurations
- WKR1, SF/3B (1840 Ω)
- WKR2, SF/3B (1840 Ω)
- 3F/3B relay (83.12Ω), two configurations
-
Non-AC Immunized Neutral Relays:
- UF/UB, SF18B, 6F12B (1260 Ω for UF/UB; 1840 Ω for SF12B; 1840Ω for 6F12B)
- Interlocked Relay configurations: using SF/3B, 6F/2B, and 6152
- Non-AC Immunized Relay (top only = 1840Ω; bottom only = 1260Ω)
QBAT Relay
- Pick up voltage = 1.75V
- Pick up current = 175 mA
- Permanent magnet with copper slug core
- One Core- 2F/2B used upto 750 m
Thermal Relay
- DC biased relays
- Siemens motorized clock work relay
- Electronic type relay
Additional Relay Types
- QECX-61 (AC relay)
- Pick-up current: ~ 108 mA
- Drop-out current: ~72 mA
- Withstand continuous currents ~250 mA
- Has a 4F/UB(A to D) dome
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Description
This quiz covers various types of relays, including series and interlocked relays. You will explore specifications for metal to carbon and metal to metal relays, as well as AC immunized and non-AC immunized options. Test your knowledge on the configurations and types of relays used in electrical systems.
