Vaisala WHP151 QUICK REFERENCE GUIDE

Quick Reference Guide

WHP151 Power Supply

 Ruggedized Mains Power Supply

 Heating and operating power outputs for standard

wind sensors and transmitters

 Temperature control of heating power output

 Compact size with mast mounting

 Outdoor use with IP65 (Nema 4) housing

DESCRIPTION

The WHP151 is a compact mains power supply unit designed for
outdoor use. It has three outputs: one provides the shaft heating power
for the WA151 wind sensors, and the other two provide the operating
power to various data loggers or transmitters measuring the sensors. It
is also applicable to many other purposes, where a weather resistant,
mast mountable power supply is required.

The heating power supply (HTGV at X6/3-4) has a thermostat control
enabling the output only at ambient temperatures below +3 °C
(approx.). The output can also be permanently enabled by removing
the jumper plug at X7. The HTGV voltage is rectified but unfiltered
DC. Two jumper selectable levels are provided, namely 38 V
tended for normal 2-sensor applications with series connected heating
elements, and 18 V

The operating power supply (RDCV at X6/5-6) has a linear fold-back
regulator with two jumper-selectable output options. The 13 VDC
option, with an 80 mA current limit, can be used for excitation of local
WAT11, WAT12 or WAT15 wind transmitters. The 20 VDC option,
with a 120 mA current limit, suits for excitation of both local and
remote WAT12, WAT15 or DAT12 transmitters.

In addition, an unregulated 30 VDC output is provided at X6/8-7.
This is useful for excitation of QLI50 or QLC50 systems. A 220 mA
total current can be taken from the 30 VDC and RDCV outputs alto­gether. This is sufficient, e.g. for a QLC50 (30 VDC) plus two WAT12
or DAT12 transmitters (RDCV). However, all possible sensor power
savings should be configured in the QLC50 and 5 mA current loops
selected in the WAT12 device(s).

Optionally, the RDCV output may be used for charging a small (12 V,

1...4 Ah) battery. During a mains break the battery will be automati­cally switched to the 30 VDC output, hence serving as a no-break
back-up supply for a QLC50 system, for example.

The WHP151 has a weather-proof, cast aluminium enclosure mount­able either to Ø 60 mm or 100 mm pole masts (the Ø 100 mm mount­ing clamp is included in the delivery).

applicable to single sensor cases, for example.

RMS

RMS

in-

INSTALLATION

Figure 1 illustrates mounting of the WHP151 to a pole mast with
the standard mounting clamp. For installation, follow the proce­dure below:

1 Remove the 4 screws attaching the unit cover. Remove the
cover.

2 Attach the unit to its mounting plate (if not already fixed) with
the two M4 screws.

3 Attach the unit to the mast at suitable height with the proper
mounting clamp.

4 Check that the X2 jumper selection corresponds to the local
mains voltage level. If not, make proper reselection. Refer to Fig­ure 2 or the instruction label on the unit's cover.

5 With the mains voltage disconnected enter the mains cable
through the leftmost cable gland and do the input wiring to X1 (L
& N, spring loaded terminals) and Earth (crimp & screw). Tighten
the input cable gland.

6 Enter the output cable(s) through the rightmost cable gland(s).
For the best protection against RF interference, follow the earth­ing instructions in Figure 4. Make sure that no cable shield mesh
gets on the circuit board. Tighten the output cable gland(s).

7 Do the output wiring to the removable screw terminal block
X6. Check for correct jumper settings at X5, X7 and X8 (refer to
the instruction label or Figure 2).

8 Carefully reattach the enclosure cover with the four screws.

Figure 2. WHP151 wiring instructionsFigure 1. WHP151 mounting

TECHNICAL DATA

Input operating power (X1)

Nominal 230 VAC ±10 %, 50/60 Hz, 0.1 A max.

Selectable option 115 VAC, 50/60 Hz, 0.2 A max.
Output power
 RDCV output (X6/3-4)

Default selection (X5/2-3) (WAT) 13.5 ±0.5 VDC, 80 mA

Optional selection (X5/1-2) (QL) 20.0 ±0.7 VDC, 120 mA

 HTGV output (X6/5-6)

Default selection (X8/2-3) for wind sensor shaft heating

Optional selection (X8/1-2, 3-4) for single sensor shaft heating

Thermostat control output enabled below +3 °C

(constantly enabled by removing the jumper at X7)
 30 VDC output (X6/8-7) Output voltage 28 ± 4 VDC (unregulated)

Total current allowed from 30 VDC and

RDCV outputs together 220 mA max.
Fuses Primary 0.25 AT replaceable fuse, 5 × 20 mm (F1)

Secondary 0.4 A and 1.1 A solid state PTC-fuses, self recovering
Electrical connections
 Input/output connectors

X1: 2-terminal connector for mains i/p (L, N)

X6: 6 terminals for power output, and two

 Jumper connectors

X2: Mains input voltage selection (230/115 VAC)

X5: RDCV output voltage selection (13/20 VDC)

X7: HTGV output enable mode (<+3 °C/constantly)

X8: Output voltage selection 18/38 V
 Cable glands 3 glands, each for cable Ø 4  8 mm

Operating temperature  50 ... +55 °C
Storage temperature  60 ... +70 °C
Humidity 0 ... 100 % RH
Material

Housing Cast aluminium, painted grey, IP65 (Nema 4)

Mounting plate Stainless steel
Dimensions

Unit 125 × 81 × 58 mm (w × h × d)

Mounting To a Ø 60 or 100 mm pole mast
Weight 1.4 kg with standard mounting accessories

38 ± 4 V

18 ± 2 V

unfiltered DC, 0.5 A max.

RMS

unfiltered DC, 1.0 A max.

RMS

(and a screw connection for Earth)

spare terminals for data cable extension

RMS

(with coaxial clamping of cable shield)

(cable glands add 20 mm to height)

Figure 3. WHP151 outer dimensions

ISO 9001

CERTIFIED
QUALITY
SYSTEM

Head Office:
VAISALA Oy
PL 26, FIN-00421 Helsinki
FINLAND
Phone: [phone]
Telefax: [phone]
Telex: 122832 vsala fi

Ref. WHP151-U188en-1.2

Figure 4. Earthing of power output cable shield

Figure 5. Typical application of the WHP151 Mains Power
Supply