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M850 MULTIFUNCTION
METERS
DESCRIPTION
The new range of Hobut multifunction panel meters
feature 96 x 96mm sizes complete with unique blue
LED screen, which can be seen in direct sunlight. The
range is easy to use, features user-programmable CT &
VT ratios, and can be used on any single or 3 phase
system with any input voltage without re-programming.
APPLICATION
The range is a cost effective replacement for traditional
panel meters and is suitable for low, medium and high
voltage control panels, gensets, building management
systems, power management and more.
STANDARD FUNCTIONS:
Phase Voltage (V)
Phase to Neutral Voltage (V)
Phase Current (I)
Frequency (Hz)
Active Power (W)
Active Energy (kWh)
Reactive Power (VAr)
Apparent Power (VA)
Reactive Energy (VArh)
Power Factor (PF)
Instantaneous Amp Demand
Instantaneous Watt Demand
Instantaneous VA Demand
Maximum Amp Demand
Maximum Watt Demand
Maximum VA Demand
Neutral Current Measurement
RANGE
ORDERING INFORMATION
PLUG-IN OPTIONS
All models feature the
following user-programmable
functions:
• Current Transformer Ratio
• Voltage Transformer Ratio
• Baud Rate, Parity, Stops
• AC or DC AUX
• 1A or 5A CT
• Single or 3 phase system
• Input voltage range 28-570V
• RS485 address, 1-247
• Security code access for
programming
PROGRAMMABLE FUNCTIONS
Suitable for any 1 or 3 phase
system, AC aux 100-440V or
DC aux 100-420V
Input 28/330V L-N
48/570V L-L
5A
STANDARD PRODUCT OPTIONAL EXTRAS
Pulsed Output
RS 485 Output
1A input (instead of 5A)
330mV Input
(instead of 1A or 5A CT)
Order example: a standard product with RS 485 output is part
number M850-MP1-RS
M850-MP1 P RS 1 MV
Both pulsed output
(for Wh or VArh) and
RS 485 output
(Modbus protocol)
are plug in options
which can be
supplied with the
multifunction meter.
If purchased
separately please use
ordering codes on
right.
RS 485 Output
when ordered separately
use part RS485-M850
Pulsed Output
when ordered separately
use part PULSE-M850
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M850 MULTIFUNCTION
METERS
ACCURACY
Volts/Amps: 0.5% of reading
Frequency: 0.1 Hz
Active Power: 1% of reading
Apparent Power: 1% of reading
Power Factor: 2% of range
Energy: IEC 1036 Class 1
INPUT
Rated Un: 28-330V LN, 48-570V L-L
Overload: 800V continuous
Burden: 0.5VA per phase
Rated In: 0.5-6A
Overload: 10 In for 1 sec
Burden: 0.5VA per phase
Auxiliary: 100-440V AC / 100-420V DC
Frequency: 45/65Hz
DISPLAY
Digits: 3 lines 9999
Size: 14.2mm 7 segment
Brightness: user adjustable
OUTPUT RELAY (Wh or VArh)
Pulse output: SPST-NO (10 watt, 300VDC, 500mA)
Pulse duration: programmable from 40msec-200msec
INSULATION
Test Voltage: 3kV RMS 50Hz for 1 minute between case,
input and aux.
1kV between case, input, aux, relay output
& RS485 output.
Impulse test: EMC 5kV transient complies with
IEC801/ EN55020 HF
Surge withstand: IEC801/EN55020 Ansi C37.90A
Interference: EHF 2.5kV 1Mhz complying to IEC255-4
Protection class II: Complying to IEC348 / BS4753 /
DIN57411 / VDE
STANDARDS
General: IEC688, BSEN60688, BS4889, IEC359
EMC: BSEN61000-6-3:2007, BSEN61000-6-4:2007,
Safety: IEC1010, BSEN601010
ENVIRONMENT
Working temp: 0-60ºC
Storage temp: -40 to +85ºC
Relative humidity: 0-95% non condensing
Shock: 30G in 2 planes
MATERIAL
Black polycarbonate case to UL94V0
Weight: 0.35kg
SPECIFICATIONS
CONNECTION DIAGRAM
DIMENSIONS (mm)
Our policy is one of continuous development and therefore specifications may change without notice.
HOWARD BUTLER LTD
CROWN WORKS, LINCOLN ROAD
WALSALL WS1 2EB ENGLAND
Tel: 01922 640003 Fax: 01922 723626
International Tel: +44 1922 640003 E-mail: [email protected]
Web: www.hobut.co.uk
VOLTAGE CURRENT
L1 L2 L3 N L1 L2 L3
1ph ! - - ! ! - 1ph 3W ! ! - ! ! ! 3ph 3W ! ! ! - ! - !
3ph 4W ! ! ! ! ! ! !
3ph 3W BAL ! ! ! - ! - 3ph 4W BAL ! - - ! ! - -
Unused Voltage terminals are internally connected
L+ N-
L1
l k
L K
L1L2L3NAUX U
H
L3
l k
L K
L2
l k
L K
96
96
L1
L2
L3
N
with plug in
option fitted
19
82
92 (+0.8)
61
92 (+0.8)
Panel cut out
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