Vacuum interrupter/ operator
| 21.0 | 25.0 | 27.0 |
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| Indirect releases | |
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| undervoltage) (optional) | ||||
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| The indirect release provides for the | |
23.0 |
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| 33.0 | conversion of | ||||||
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| powerful | ||||||||
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| 31.0 | |||
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11.0 |
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| primarily used to trip | |
13.0 |
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| 7.0 | circuit breakers while functioning as a | |
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| secondary | |||
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9.0 |
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| 1.0 | |||||||
15.0 |
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5.0 |
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| These releases are | |
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| storage devices. Their internal springs are | ||
3.0 |
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| charged as a consequence of the circuit- | |
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| breaker mechanism operation. This energy | |
1.0 | - Magnet core |
| 15.0 - Tripping pin | is released upon application or removal (as | ||||||
| appropriate) of applicable control voltages | |||||||||
3.0 | - Housing |
| 21.0 - Locking pin | |||||||
| (refer to Figure 23: Construction of | |||||||||
6.0 | - Mounting holes |
| 23.0 - Striker pin | secondary shunt release (shown charged) | ||||||
7.0 | - Magnet coil |
| 25.0 - Latch | and Figure 24: Latch details (shown | ||||||
| charged) on page 30 and Figure 25: | |||||||||
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9.0 | - Magnet armature |
| 27.0 - Spring | Undervoltage lock/operate selection on | ||||||
11.0 - Tension spring |
| 31.0 - | page 31). | |||||||
13.0 - Adjusting | Secondary shunt release (optional) | |||||||||
| for 11.0 |
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| (54.2) | |
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| A secondary shunt release (second trip | |
Figure 23: Construction of secondary shunt release (shown charged) | ||||||||||
coil) is used for electrical tripping of the | ||||||||||
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| circuit breaker by protective relays or | |
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| Locked/unlocked selection screw | |||||||
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| one trip coil is required. The second trip | |||||||
23.0 | 25.0 |
| (undervoltage release only) | |||||||
| coil is generally connected to a separate | |||||||||
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| 29.0 |
| auxiliary supply (dc or ac) from the control | ||
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| supply used for the normal trip coil. | ||||
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| Undervoltage release (optional) (54.2) | |
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| The undervoltage release is used for | |
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| continuous monitoring of the tripping- | |
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| supply voltage. If this supply voltage falls | |
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| excessively, the undervoltage release will | |
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| provide for automatic tripping of the circuit | |
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| breaker. | |
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| The undervoltage device may be used for | |
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| manual or relay tripping by employing a | |
| 21.0 |
| 27.0 |
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| contact in series with an undervoltage- | |||
21.0 - Locking pin |
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| device | ||
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23.0 - Striker pin
25.0- Latch
27.0- Spring
29.0 - Lower connection terminal