Specifications are subject to change without notice
1
Current and Voltage Controls
Product Description
3-phase monitoring plug-in
relay for separate upper and
lower voltage control. Often
used where the generated
electrical power is unstable
Ordering Key
Housing
Type
Output
Power supply
Monitoring relay and 3-phased measur-
ing relay for upper/lower phase-phase
voltages control
Measures if all 3 phase-phase voltages are within
set limits
Measures on own power supply
Operates irrespective of phase sequence
Upper and lower limits separately adjustable
Built-in adjustable timer function
Output: 10 A SPDT relay
Plug-in type module
S-housing
LED-indication for power supply and output ON
Power supply is the 3-phased measuring voltage
(or incorrect) in order to se-
cure the equipment. The
S 172 features built-in time
delay.
Type Selection
Plug
Output
Timer
Supply: 220 VAC
Supply: 380 VAC
Supply: 400 VAC
Supply: 415 VAC
Circular
SPDT
Yes
S 172 156 220
S 172 156 380
S 172 156 400
S 172 156 415
Circular
SPDT
No
SYY 165 220
SYY 165 380
SYY 165 415
Input Specifications
Input
Pins 5, 6 & 7
Arbitrary phase sequence
Measuring ranges (VAC)
Power supply (phase-phase)
3 x 220
3 x 380
3 x 400
15%
15%
15%
Range
187-253 323-437 340-460
Upper level
231-253 399-437 420-460
Scale
105-115%105-115%105-115%
Lower level
187-209 323-361 340-480
Scale
85-95% 85-95% 85-95%
Power supply (phase-phase)
3 x 415
15%
Range
353-477
Upper level
436-477
Scale
105-115%
Lower level
353-394
Scale
85-95%
measures average value of
own supply, whereas scale
ranges are calibrated to
rms-value
Voltage interruption
40 ms
Dielectric voltage
None (supply/elect.)
Rated impulse withstand volt.
4 kV (1.2/50 s) (line/neutral,
line/line), direct connection
to electronics
Output
SPDT relay
Rated insulation voltage
250 VAC (rms)
(cont./elect.)
Contact ratings (AgCdO)
(micro gap)
Resistive loads
AC 1
10 A/250 VAC (2500 VA)
DC 1
1 A/250 VDC (250 W)
or
10 A/25 VDC (250 W)
Small inductive loads AC 15
2.5 A/230 VAC
DC 13
5 A/24 VDC
Mechanical life
30 x 10
6
operations
Electrical life
AC 1
2.5 x 10
5
operations
(at max. load)
Operating frequency
7200 operations/h
Dielectric strength
Dielectric voltage
2 kVAC (rms) (cont./elect.)
Rated impulse withstand volt.
4 kV (1.2/50 s) (cont./elect.)
(IEC 60664)
3 Phase-phase Max. and Min. Voltage Control
Types S 172, SYY 165
Output Specifications
S 172 156 220
2
Specifications are subject to change without notice
S 172, SYY 165
Reaction time
= 1 s, worst case reaction
time may be up to 5 x
Adjustable delay on release
built-in (0.2 - 10 s)
Note:
Reaction time + set time
= real delay on release time
Accuracy
OFF delay
10s, -1/+3 on max.
< 0,1s on min.
Time function (only S 172)
Delay on release 0.2-10 s. adj.
Indication for
Power supply ON
LED, green
Output ON
LED, red
Environment
(IEC 60947-1)
Degree of protection
IP 20 B (IEC 60529)
Pollution degree
(IEC 60664)
1: S 172 380/400/415
SYY 165 380/415
2: S 172 220, SYY 165 220,
Operating temperature
-20 to +50C (-4 to +122F)
Storage temperature
-50 to +85C (-58 to +185F)
Weight
200 g
Approvals
UL, CSA
Power supply AC types
Overvoltage cat. III (IEC 60664)
Rated operational voltage
(IEC 60038)
through pins 5, 6 & 7
220
3 x 220 VAC 15%,
45 to 65 Hz
380
3 x 380 VAC 15%,
45 to 65 Hz
400
3 x 400 VAC 15%,
45 to 65 Hz
415
3 x 415 VAC 15%,
45 to 65 Hz
Voltage interruption
40 ms
Dielectric voltage
None (supply/elect.)
Rated impulse withstand volt. 4 kV (1.2/50 s) (line/neutral,
line/line), direct connection
to electronics.
Internal measuring circuit is
connected to pins 5 & 7
Rated operational power
5 VA
Sockets
S 411
Hold down spring
HF
Mounting rack
SM 13
Socket covers
BB 4
Front mounting bezel
FRS 2
Potentiometer lock
PL 2
For further information refer to "Accessories".
Accessories
Time/Range Setting
Range setting
Upper potentiometer:
Adjustment of upper limit in
%.
Middle potentiometer:
Adjustment of lower limit in
%.
Hysteresis
2% of rms-value
Time setting
Bottom potentiometer:
Time setting on relative scale
(not SYY 165).
Time
Adjustable delay on release:
0.2 to 10 s
Connected to 3 phases, the S
172 and SYY 165 measure
sinusoidal voltages. The phase
sequence is arbitrary.
The relay operates as long as
all 3 phase-phase voltages
are within the set upper and
lower limits. The two limits
can be adjusted separately.
For S 172 applies that if one
or more of the phase-phase
voltages rises above the up-
per limit or drops below the
lower limit, the relay releases
after the set time period
whereas SYY 165 releases
immediately.
The relay operates again
when all 3 phase-phase volt-
age are within set limits. Hys-
teresis on operate is 2%.
Example 1
Mains monitoring
The relay measures if the 3
phase-phase voltage are
within the upper and lower
limits. The limits are adjusted
by the two built-in potentio-
meters.
Example 2
Monitoring load supply
The relay can protect loads,
such as heating elements,
against overvoltage and
thereby against increase in
current, which could other-
wise destroy the heating ele-
ments.
Undervoltage to ohmic loads
causes insufficient heating
capacity, and this can also be
monitored.
The relay cannot be used for
load monitoring if the load is a
motor, as the regenerated
phase voltage, at e.g. fuse
breakdown, is indefinable and
dependent on the mechani-
cal performance when the
failure occurs (see S 171).
Mode of Operation
Supply Specifications
General Specifications
PDF 
ZIP