Pilz P1WM Data Sheet

Electronic Monitoring Relays

True power monitoring

P1WM

True power monitor for 1- and 3-phase supplies for monitoring maximum true power values

Features

●Direct measurement of motors with a 2.2 kW (400 V) rating

●Output signal either latching or non-latching

●Adjustable reaction times

●Trip device if overload occurs

●Operates to normally energised or normally de-energised mode

●Suitable for current transformers

Technical Details	P1WM
Electrical data
Measuring voltage = supply voltage	3 AC/1 AC: 42, 110, 230, 400, 415, 500,
	550 VAC
Tolerance	85 ... 110 %
Power consumption	Approx. 5 VA
Switching capability in accordance
with EN 60947-4-1, 10/91 AC1:	240 V/0.1 ... 5 A/1100 VA
	DC1: 24 V/0.1 ... 1 A/240 W
Output contacts	1 auxiliary contact (C/O)
Contact fuse protection in accordance	6	A quick or 4 A slow
with EN 60947-5-1, 10/91
Max. switch-on current	10 A AC
Measuring circuit
Adjustable measuring range limit values	1	A version: 0...0.35; 0.25...0.7; 0.67...1 A
	5	A version: 0 ... 1; 1.1 ... 3; 3.3 ... 5 A
Max. overload	1	A version: 1.2 A, 6 A/max. 3 s
	5	A version: 6 A, 25 A/max. 3 s
Response delay	1A version: 0.25 ... 3 s adjustable
	5	A version: 0.25 ... 30 s adjustable
Start-up suppression time	0.5 ... 20 s adjustable
Requirement for current transformer	1 A version: 1.5 ... 7.5 VA
	5	A version: 2.5 ... 15 VA
Mechanical data
Max. cable cross section	2 x 2.5 mm2
of external conductor	Single-core or multi-core with crimp
	connector
Torque setting for connection terminals	1.2 Nm (screws)
Dimensions (H x W x D)	75 x 90 x 115 mm
Weight	470 g

Description

The P1WM true power monitor is enclosed in a 90 mm wide P-75 housing. All three external conductors are used as the supply voltage. There are 7 versions available for use with 3-phase AC voltage supplies.

Features:

●Relay output: 1 auxiliary contact (C/O)

●2 versions with adjustable measuring ranges up to max. 1 A or up to max. 5 A

●Overload switching points

●Adjustable response delay

●Adjustable start-up suppression time

●Automatic or manual reset

●LED-display for supply voltage and switching status of the auxiliary contacts Pmax

The P1WM monitors whether true power exceeds a defined level in AC or 3-phase current loads. The signal, which is proportional to the true power, is derived by multiplying the voltage and current. The maximum permitted true power Pmax is set using a potentiometer. If the measured true power PW exceeds the preset value Pmax, the output relay K1 switches and the red LED will be on.

Pilz GmbH & Co., Felix-Wankel-Straße 2, 73760 Ostfildern, Deutschland	NSG-D-2-253-10/00
Telefon [phone], Telefax [phone], E-Mail: [e-mail]

Electronic Monitoring Relays

True power monitoring

P1WM

Internal wiring diagram

L1	k			Pmax
IM	IM							12	14
	UL1
			P		DPmax
	Iint	UL1 * Iint * cos j* k		& Pmax - PW		&	tr	K1
	n * IM Iint							11
U(I) Y1 Y2		ta				Control logic		Y3
								Y4
L1		+						Y5
L2	Power supply
L3		0
V W		N

IM

Measuring currents

cos j Power factor

PW

True power

n

Measuring range factor

k

Correction factor

Pmax

Max. True power

UL1

Measuring voltages

ta

Start-up suppression time

tr

Response delay

Timing diagram

Measuring circuit

Pmax

Pmin

0

Operating

1

voltage UB

0

Output Pmax (K1, RB)

1

0

Output Pmax (K1, AB)

1

0

t a

t r

PW > Pmax

RB

Normally energised mode

IM

Measuring current

n

Measuring range factor

AB

Normally de-energised mode

Iint

Internal measuring current

ta

Start-up suppression time

Pmax

Response value, overload

cos j Power factor

tr

Response delay

UL1

Measuring voltage at L1

k

Correction factor

Pilz GmbH & Co., Felix-Wankel-Straße 2, 73760 Ostfildern, Deutschland	NSG-D-2-253-10/00
Telefon [phone], Telefax [phone], E-Mail: [e-mail]