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參數(shù)資料
| 型號(hào)： | SY115220 |
| 文件頁(yè)數(shù)： | 2/3頁(yè) |
| 文件大?。?/td> | 71K |
| 代理商： | SY115220 |
2
Specifications are subject to change without notice (26.10.99)
SY 115
SY 115 can be used for moni-
toring the actual load of asyn-
chronous motors.
The relay measures the angle
between motor current and
motor voltage, i.e. phase an-
gle difference. This angle al-
ways exists, and its change is
almost proportional to the ac-
tual motor load (contrary to
the motor current).
The characteristics of the load
depend on the type of motor,
and the phase difference, cos
, depends on the actual load.
It is therefore recommended
to adjust cos
after practical
tests.
Mode of Operation
Power ON delay
Reaction time
Indication for
Power supply ON
Output ON
Environment
Degree of protection
Pollution degree
Operating temperature
Storage temperature
Weight
Approvals
3-7 s
typically 0.5 s
LED, green
LED, red
(IEC 60947-1)
IP 20 B (IEC 60529)
2 (IEC 60664)
-20° to +50°C (-4° to +122°F)
-50° to +85°C (-58° to +185°F)
200 g
UL, CSA
General Specifications
The relay contact in SY 115
should be employed as a stop
function in a system with ex-
ternal restart. Phase sequence
is arbitrary.
Example 1
SY 115 is connected to a cur-
rent metering transformer,
type MI, as well as to a 3-
phased asynchronous motor.
The relay operates when cos
is below the set value. At
inversion (dotted line) the re-
lay operates when cos
ex-
ceeds the set value.
Example 2
By a combination of normal and
inverted functions, SY 115 mo-
nitors whether cos
is within
either set upper or lower limits.
Measuring range
cos
= 0-0.9.
With current metering trans-
former, type MI 100 or MI 500.
Measuring of current phase
Measuring input for connec-
tion of current metering trans-
former: Pins 8 and 11.
If the current is below 2.5 A,
the cable may pass through
the central hole of the current
metering transformer several
times so that the number of
turns multiplied by the cur-
rent consumption lies within
the current range of the trans-
former.
The current metering trans-
former should be mounted in
Range Setting
such a way that the current
"flows" from the front towards
the rear of the transformer.
Measuring
The voltage as well as the
current are measured on the
phase connected to pin 5.
Range setting
Knob-adjustable on absolute
scale (cos
).
Inversion
The output signal can be in-
verted by interconnecting
pins 9 and 11 directly on the
socket.
Hysteresis
10° equalling approx. 1 gra-
duation mark on the scale.
Wiring Diagrams
Example 1
SY 115
Accessories
Sockets
Hold down spring
Mounting rack
Socket cover
Front mounting bezel
Potentiometer lock
Current metering transformers
S 411
HF
SM 13
BB 4
FRS 2
PL 3
MI 100, MI 500.
For further information refer to "Current Metering Transfor-
mers" and "Accessories ".
inv.
black
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