5-4.1 Timing; 5-4.2 Terminal Blocks; Operations Counter - Eaton Cutler-Hammer VCP-WR 18 Series Instructions For The Use, Operation And Maintenance

I.B. 8295A61H03
Note the position switch (PS1) contact in the spring
release circuit in the scheme. This contact remains
made while the breaker is being levered between the
TEST and CONNECTED positions for appropriately
retrofitted breakers. Consequently, it prevents the
breaker from closing automatically, even though the
control close contact may have been made while the
breaker is levered to the CONNECTED position.
When the CS/C contact is made, the SR closes the
breaker. If the CS/C contact is maintained after the
breaker closes, the Y relay is picked up. The Y/a contact
seals in Y until CS/C is opened. The Y/b contact opens
the SR circuit, so that even though the breaker would
subsequently open, it could not be reclosed before
CS/C was released and remade. This is the anti-pump
function.

5-4.1 TIMING

The opening and closing times for the circuit breakers
vary depending upon the control voltage and the power
rating. Typical values for VCP-WR breakers are shown
in Table 5.1.

5-4.2 TERMINAL BLOCKS

All VCP-WR breaker elements are supplied with 2 12-
point secondary control terminal blocks for simple sec-
ondary control access. A number of points are used for
breaker operation with a number of spare contacts for
customer use. Refer to the control schemes of Figure
6-2 for exact contact useage and availability.
Effective 7/97
Table 5.1 Breaker Timing
Event
Closing Time
(From Initiation of Close
Signal to Contact Make)
Opening Time
(Initiation of Trip Signal
to Contact Break)
Reclosing Time
(Initiation of Trip Signal
to Contact Make)
The terminal blocks are in different locations for each
series of VCP-WR breakers. Series 18 terminal blocks
are located at the top of the breaker element (Figure
3-1). Series 20 terminal blocks are located behind the
breaker faceplate in the front, lower left portion of the
breaker with control wire access from the bottom. Series
29 terminal blocks are located at the bottom of the
breaker element (Figure 3-5).

5-5 OPERATIONS COUNTER

All breakers are equipped with a mechanical operations
counter. As the breaker opens, the linkage connected to
the pole shaft lever advances the counter reading by
one (Figure 3-7).
Page 27
Milliseconds (maximum)
75
45
190