Electronic Monitoring Relays

True power monitoring

S1WP
Technical details
Electrical data
Supply voltage
Tolerance
Frequency range
Power consumption
Switching capability to
EN 60947-4-1, 10/91
EN 60947-5-1, 10/91

True power monitor for single and

3-phase networks used to measure
and monitor therated power and true
power on electrical machines

Features
9 different measuring ranges
Large voltage measuring range
Analogue output can be
switched for current and voltage
Relay output for signalling
underload or overload
Suitable for use with frequencycontrolled motors
Suitable for current transformers

Output contacts
Contact material
Contact fuse protection
to EN 60947-5-1, 10/91
Analogue measuring output
Analogue reaction time
Linearity/switching accuracy
Measuring circuit
Measuring voltage
Frequency range
Adjustable measuring range limits
Max. measuring current
Max. overload
Reaction time for monitoring
Start-up suppression time
Requirements for current transformer

Approvals
S1WP

Environmental data
Ambient temperature
Mechanical data
Max. cross section of external conductor

Dimensions (H x W x D)
Weight

Description
The true power monitor is enclosed
in an S-95 22.5 mm slimline housing.
There are 4 voltage measuring
ranges. For each measuring range
there are 4 versions available,
determined by measuring current
and control voltage.

S1WP

DC: 24 V
AC/DC: 230 V
DC: 85 ... 125 %
AC/DC: 25 ... 115 %
30 ... 400 Hz
DC: 2 W at UB 24 V
AC: 5 VA at UB 230 V
AC 1: 240 V/0.1 ... 5 A/1200 VA
DC1: 24 V/0.1 ... 5 A/120 W
AC15: 230 V/0.1 ... 1.8 A
DC13: 24 V/0.1 ... 1.5 A
1 auxiliary contact (C/O)
AgCdO, 3 m gold plating for
low-load range 1-50 V/1-100 mA
6 A quick or 4 A slow
Voltage: 0 ... 10 V
Current: +4 ... + 20 mA
60 ms
< 2 %
3AC/1AC/DC: 0 ... 120, 0 ... 240,
0 ... 415, 0 ... 550 V
0 ... 1000 Hz
See table
22 A with 100 % continuous duty
45 A/max. 3 s
UL: 0.1 ... 20 s (adjustable)
0.1 ... 30 s (adjustable)
I = 1 A: 1,5 ... 7.5 VA, Class 3
I = 5 A: 2,5 ... 15 VA, Class 3
0 ... +55 C
1 x 4 mm or 2 x 1.5 mm 2
Single-core or multi-core
with crimp connector
87 x 22.5 x 122 mm
DC: 130 g, AC: 150 g

Features:
Relay output:
1 auxiliary contact (C/O)
Versions for 9 A and 18 A
current measuring ranges
Fast analogue reaction time
Adjustable switching threshold for
underload or overload from 5 to
100 % of the measuring range
limit
(Continued on next page)

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Strae 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de

NSG-D-2-257-2005-04

Electronic Monitoring Relays

True power monitoring
S1WP
Switching hysteresis of 15 %
Adjustable monitoring reaction
time
Adjustable start-up suppression
time
LEDs for supply voltage and
switching status of underload
and overload auxiliary contacts
The S1WP monitors the set upper
and lower true power threshold
levels in a single or 3-phase network.
It converts the true power or rated
power on a motor or generator into
an analogue signal output, which is

proportional to true power. The

status of threshold monitoring,
together with the analogue signal
output, is indicated by a relay output.
The S1WP operates in normally
energised mode, which means in its
initial state the contact 11-14 is
closed and 11-12 is open. If normally
de-energised mode is required, the
function of the upper and lower
threshold is inverted.
If the measured true power exceeds
the switching threshold when set to
overload (UL), the auxiliary contact

switches position and the LED FLT

LED is lit. If the measured true power
falls below the switching threshold
when set to underload (LL), the
auxiliary contact switches position
and the LED FLT LED is lit.
To avoid spurious output signals
during the start-up phase, measurement is suppressed.
Start-up suppression time ts can be
set. Transient load fluctuations which
exceed the switching threshold can
be suppressed and the reaction time
tr can be set.

Block diagram

L1
L2
L3
N

UM

K1

IM

p = RANGE * UM
* IM * cos j

12

tr
delay

14

&
11

UL1
RANGE

ts
delay

S1

A1
A2

UB

S2

LEVEL

FLT

FLT

UL

LL

Instantaneous value
U/I

+
0
-

UM Measuring voltage
Measuring current
IM
UB
Supply voltage
cos Power factor

RANGE Measuring range

LEVEL Switching threshold

ts
tr

UL
LL

Start-up suppression time

Reaction time

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Strae 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de

Overload threshold
Underload threshold

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Electronic Monitoring Relays

True power monitoring
S1WP
Pulse diagram

U/I, P
100 %
LEVEL UL

P
Hysteresis

10 V
20 mA

RANGE

U/I

U/I
Hysteresis

LEVEL LL
5%

Generator

t
Threshold status UL

4 mA
0V

- P max

P max

PW

Motor
FLT
ts

tr

tr

Threshold status LL

-10 V
FLT
tr

P
U/I

Actual true power

Analogue output signal,
voltage or current

Adjustable measuring range limits P

if used in three-phase network

Meas. range [V]

3 AC

0 ... 70

0 ... 120

0 ... 140

0 ... 240

0 ... 240

0 ... 415

0 ... 320

0 ... 550

kW P [kW]

TEST (reserved function)

1 AC/DC

RANGE

Version
IM [A] UM [V]

0,208

0,415

0,623

0,83

1,04

1,25

1,45

1,66

1,87

0,415

0,83

1,25

1,66

2,08

2,5

2,91

3,32

3,74

18

0,415

0,83

1,25

1,66

2,08

2,5

2,91

3,32

3,74

0,83

1,66

2,5

3,32

4,15

4,5

5,8

6,65

7,5

18

0,72

1,44

2,15

2,88

3,6

4,3

5,03

5,75

6,5

1,44

2,87

4,3

5,75

7,19

8,6

10,0

11,5

13,0

18

0,95

1,9

2,85

3,8

4,76

5,7

6,7

7,6

8,6

1,9

3,8

5,7

7,6

9,5

11,4

13,34

15,24

17,15

18

120

240

415

550

The variable UM refers to the phaseto-phase voltage in the three-phase

network (3AC).
With single-phase networks (1 AC),
the voltage measuring range drops
to
UM (1 AC) =

UM (3AC)
3

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Strae 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de

NSG-D-2-257-2005-04

Electronic Monitoring Relays

True power monitoring
S1WP
Connection examples
Example 1
Monitoring a three-phase AC motor, IN < 9 A/18 A
L1
L2
L3
N
UB
0V
F2

F1

UN
L1
A1

K1 UL1
U/I

A2

S1WP
UB: 24 V DC

12

14

11

L2

L3

K1

M1
IN 9 A/18 A

U VW
M3~

PE

Example 2
Monitoring a three-phase AC motor; IN > 9 A/18 A
L1
L2
L3
N

F1

L1 K1 UL1
U
A1N U/I A2
S1WP

k K

UB: 230 V AC

T1
l L

12

14

11

L2

L3

1
K1

Max. cable cross section 4 mm

M1
IN > 9 A/18 A

U VW
M3~

PE

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Strae 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de

NSG-D-2-257-2005-04

Electronic Monitoring Relays

True power monitoring
S1WP
Example 3
Monitoring a single-phase motor, IN < 9 A/18 A

L1
N
UB
0V
F1

F2

UN
L1
A1

K1 UL1
U/I

A2

S1WP
UB: 24 V DC

12

14

11

L2

L3

K1
K1

H2
M1
IN 9 A/18 A

U1 U2
M 1~

PE

Example 4
Monitoring a single-phase motor; IN > 9 A/18 A

L1
N
F1

L1 K1 UL1
U
A1N U/I A2
S1WP
UB: 230 V AC

k K
T1
l L

K1

12

14

11

L2

L3

H2
K1

Max. cable cross section 4 mm

M1
IN > 9 A/18 A

U1 U2
M 1~

PE

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Strae 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de

NSG-D-2-257-2005-04

Electronic Monitoring Relays

True power monitoring
S1WP
General technical details
Unless stated otherwise in the technical details for the specific unit.
Electrical data
Frequency range AC
Residual ripple DC
Contact material
Continuous duty
Environmental data
EMC
Vibration in accordance with
EN 60068-2-6, 04/95
Climatic suitability
Airgap creepage
Ambient temperature
Storage temperature
Mechanical data
Torque setting for connection terminals
Mounting position
Housing material
Protection types

Order references key

IM
Measuring current
UB
Control voltage
UM Measuring voltage

50 ... 60 Hz
160 %
AgCdO
100 %
EN 50081-1, 01/92; EN 50082-2, 03/95
Frequency: 10 ... 55 Hz,
Amplitude: 0.35 mm
IEC 60068-2-3, 1969
DIN VDE 0110-1, 04/97
-10 ... +55 C
-40 ... +85 C
0.6 Nm (screws)
Any
Thermoplastic Noryl SE 100
Mounting: IP 54
Housing: IP 40
Terminals: IP 20

Order references
Type
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP
S1WP

IM
9A
9A
9A
9A
9A
9A
9A
9A
18 A
18 A
18 A
18 A
18 A
18 A
18 A
18 A

UB
24 V DC
24 V DC
24 V DC
24 V DC
230 V AC/DC
230 V AC/DC
230 V AC/DC
230 V AC/DC
24 V DC
24 V DC
24 V DC
24 V DC
230 V AC/DC
230 V AC/DC
230 V AC/DC
230 V AC/DC

UM
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...
0 ...

120
240
415
550
120
240
415
550
120
240
415
550
120
240
415
550

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Strae 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de

V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V

AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC
AC/DC

Order No.
890 000
890 010
890 020
890 030
890 040
890 050
890 060
890 070
890 100
890 110
890 120
890 130
890 140
890 150
890 160
890 170

NSG-D-2-257-2005-04