Advertisement
L
..
>
.3
NETWORK RELAY
TYPES CAL16A AND CAN13A
INTRODUCTION
With a few
el;',
eptions, the Type CAL16A and
CAN13A relays are Identical In conslruction and
function to the standard secondary network relays
shown In the Included Instruction book GEI-13580.
The CAN13A wlll prevent reclosure if the source
phase sequence Is reversed and the network phase
sequence Is normal.
The principal difference
af-
fecting both relays Is that Ihe glass cover and
mountlng bracket have been removed, and the relays
have been mounted In the drawout case for mounllng
on a panel. Also, both relays have 2 ampere holding
coils In the reclose circuits, Instead of the 0.3
ampere coils as In the standard relay.
The Type CAN13A relay differs from the Type
CANllA relay In several points concerning physical
construction and electrical connections.
The only
change in function is that
It
Is designed to trip at
approximately 0.005 ampere, current transformer
secondary current, In phase with line-to-neutral
voltage.
It is intended to be used for tripping when
the only reverse power flowing Is the magnetizing
current of the associated power Iransformer.
The principal diHerences between the Type
CAN13A relay and the Type CANIlA relay are as
follows:
1.
The reclose contact Is on the left and
the
Irlp
contact on the right, facing the relay, On the
Type CAN 13A relay. This Is the reverse of the
Type CANllA relay.
2. The rna In control spring Is used to adjust trip
value and the mechanical restraint Is used to
adjust
r~close
value on the Type CAN13A relay.
3. The electrical restraint element has been omitted
on the Type CANI1A relay.
4. The potential coils, Instead of being connected
directly to the network side of the breaker are,
connected to a reststor combination across each
pole of the associated breaker.
This last feature allows the potential coils to
be energized from the network side when the source
side Is de-energized; or from the source side when
the network side is de-energized. When the breaker
is closed, the two sections of the resistor com-
bination on each phase are effectively In parallel
and the net resistance is the same as that ordinarily
used with the Type CANIIA relay (I.e., 340 ohms
when 6054912 GS Is used as the phase-shiftlng trans-
for mer, and when the 900 ohm resistor Is used
in
the phase circuit for 1.5 volt reclosure.) Therefore
the tripping characteristic is the same except that
the setting is 0.1% insteadofO.2%ofthe relay rating.
RECEIVING, HANDLING AND STORAGE
The relays, when not Included as a part of a
control panel, will
be
shipped in cartons designed
to protect them against damage. Immediately upon
receipt of a relay examine It for any damages sus-
ta Ined in transit.
11 injury or damage from rough
handling is evident, file a damage claim at once
with the transportation company and promptly notify
the nearest General Electric Apparatus Sales OHice.
Reasonable care should be exercised in unpack-
Ing the relay in order thai none of the parts are
Injured or the adjustments dlstrubed.
If
the relays are not to be Installed immediately,
they should be stored in their original cartons in a
place that Is free from moisture, dust and metallic
chips.
Foreign matter collected on the outside of
the case may lind its way Inside when the cover is
removed and cause trouble in the operation of the
relay.
DESCRIPTION
RELAY
CASE
The case is suitable for either surface or
semi-flush panel mounting and an assortment of
hardware is provided for either mounting.
The
cover attaches to the case and also carries the
reset mechanism when one is required. Each cover
screw has provision for a sealing wire.
The case
both ends or
connections.
has studs or screw connectlons at
at the bottom only for the external
The electrical connectlons between
Th<ese instructions
do
not purport to cover
all
details or variations in
eqUipment
llor to provide for
every possible ccntingency to be met in connection with installation,
operation
or maintenance.
Should
further
infonrldtion
be desired or should
p,uticuldr
problems arise ",hich .Ice not covered sufficiently foc
the purchaser's purposes, the mdttec should
be
referred to the General
~lectrjc
Company.
To the extent required the prcxlucts described herein meet applicdble ANSI,
IEEE and NEliA stdnddIdsl
but no such assurance is given with respect to local codes 4nd ordinances because they vary greatly.
3
Advertisement
