Pilz P1WP3 Data Sheet

Electronic Monitoring Relays

True power monitoring

P1WP3

Technical Details P1WP3

Electrical data

Supply voltage (= measuring voltage) 3 AC: 24, 42, 48, 110, 120, 230, 240,

Tolerance 85 ... 110 %
Power consumption Approx. 4 VA
AC frequency range 50 ... 60 Hz

Output circuit

Motor operation:
Output voltage
Terminating impedance > 1 kW
Output current DC: 0 ... 20 mA
Terminating impedance < 0.5 kW
Generator operation:
Output voltage

True power converter for 1 and
3-phase power supplies with
analogue true value output

Features

● Direct measurement of motors

with a 2.2 kW (400 V) rating

● Analogue output 0 ... 20 mA

and 0 ... 10 V

● 2-phase current measurement

(Aron wiring principle)

● Short reaction times

● High degree of accuracy

● Suitable for current transformers

● Suitable for use on motors and

generators

Terminating impedance > 2 kW
Output current DC: 0 ... -10 mA
Tterminating impedance < 0.5 kW

Measuring circuit

Adjustable measuring range limit values 1 A version: 0.2; 0.4; 0.6; 0.8; 1 A

Max. overload 1 A version: 1.2 A, 6 A/max. 3 s

Reaction time Approx. 50 ms
Start-up suppression time 0.5 ... 20 s adjustable
Requirements for current transformer 1 A version: 1.5 ... 7.5 VA, Class 3

Mechanical data

Max. cable cross section 2 x 2.5 mm
of external conductor Single-core or multi-core with crimp

Torque setting for connection terminals 1.2 Nm (screws)
Dimensions (H x W x D) 75 x 45 x 110 mm
Weight 380 g

400, 415, 440, 460, 500 550 V

DC: 0 ... 10 V

DC: 0 ... -10 V

5 A version: 1; 2; 3; 4; 5 A

5 A version: 6 A, 25 A/max. 3 s

5A variant: 2.5 ... 15 VA, Class 3

2

connector

4

Description

The true power monitor is enclosed
in a P-75 housing. Three phase AC
voltage is required for operation.
Features:

● 2 versions, each with 5 adjustable

measuring ranges, up to max. 1 A
or up to max. 5 A

● Adjustable start-up suppression

time

● LED for supply voltage

The P1WP3 converts the true power
or rated power used on a drive or
generator into an electric output
signal. The load current IM is
measured to do this. The converter
establishes the true power from the
load current and the supply voltage.

Pilz GmbH & Co., Felix-Wankel-Straße 2, 73760 Ostfildern, Deutschland NSG-D-2-234-07/00
Telefon [phone], Telefax [phone], E-mail: [e-mail]

The converter uses the Aron circuit
principle. It forms an output signal U
or Ia proportional to true power.
An additional evaluation device is
required for further signal proces­sing. Measurement is suppressed
during the start-up phase to avoid
spurious output signals. The start-up
suppression time ta can be adjusted.

a

Electronic Monitoring Relays

True power monitoring

P1WP3

Block diagram

k1 k3

IM3I

M1

U/I1 W/I3

U

Measuring voltages

L1 ... 3

I

Measuring currents

M1...3

n Measuring range factor

n*I

n*I

M3

M1

L1 L2 L3

U Measuring voltage

Timing diagram

Power supply

Multiplexer voltage

Multiplexer
current

cos j Power factor
P

W

h Efficiency

+

0

-

U

L1, L3

I

M1, M3

True power

= U

= I

U*I

M

cos j*k

M

*

t

a

P

W

&

U

A

I

U

A

P

A

I

U

A

N
I

A

t aStart-up suppression time
UAOutput voltage
IAOutput current

4

U

Output voltage

A

I

Output current

A

10 V
20 mA

Generator operation

-P

max

U

A

-10 mA

-20 V

"x"

U

A

I

A

Motor operation

P

max

W

P

Pilz GmbH & Co., Felix-Wankel-Straße 2, 73760 Ostfildern, Deutschland NSG-D-2-234-07/00
Telefon [phone], Telefax [phone], E-mail: [e-mail]