Accessories Data Sheet
Backplanes BPD, BPF for T Series
Features
•
19" / 3U Rack-Systems
•
Easy configuration of telecom rectifiers,
battery chargers and power bus systems
•
Provides controller function
• 1.6 kW maximum power
•
Single or triple phase connection
•
Redundant configuration possible
Description
The back plane types BPF1000 and BPD1000 have been
designed for fast and simple set-up of 19" rack mounted
power supply systems powered by AC-DC converters of the T
series. Battery charger systems, telecom rectifiers and
modular power bus systems can easily be configured with
n+1 redundancy if required. Three T Series converters can be
plugged into one back plane providing up to 1.6 kW output
power.
Since for such applications the status of the power bus is of
importance rather than the output status of a single AC-DC
converter, T units with option D should be chosen enabling re-
mote bus voltage sensing.
The back plane concept allows system assembly in next to no
time. When fitted in the rack all input and output terminals are
readily accessible from the rear. The AC input is designed for
single or 3-phase operation. The monitoring signals and the
control signal inputs and outputs are available from a screw
terminal strip. System specific signal combination is possible
with different jumper settings. The back plane fulfills in this
way the function of a controller unit.
The layout of the back plane and the hot plug-in capability of
the AC-DC converters allow system expansion under load
(e.g. from 550 W up to 1.6 kW) by simply inserting further
T units into the rack. Larger system power extension is just a
matter of interlinking the DC output rails and signal outputs of
two or more racks.
The back planes are available in 2 basic versions:
BPD1000:
A front-end version, fitted with decoupling di-
odes in each positive line to the DC bus, for systems
with 2 or more T units in parallel or n+1 redundancy.
BPF1000:
A battery charger version, in which each out-
put is fitted with a fuse in the positive line to the DC bus,
for battery charging or rectifier systems with two or
more T units in parallel or n+1 redundancy.
For minimum electromagnetic emission at the input, both the
BPD and the BPF versions are fitted with input filters. Should
project specific requirements demand enhanced hold-up
time or lower output ripple (low frequency ripple) than
specified for the individual AC-DC converters, both basic back
plane versions are available with additional output capacitors.
Important:
The neccessity to provide a cover over the live
parts at the mains input (High Voltage) or over the DC bus bars
(Energy Danger), preventing accidental contact during instal-
lation, start-up of a system or maintenance, depends on the
final installation as well as on the applicable safety require-
ments. However, it is the responsibility of the installer or user
to provide such a safety cover to assure the compliance with
the relevant and applicable safety standards.
Table of Contents
Page
Page
Electromagnetic Compatibility (EMC) ............................. 7
System Integration .......................................................... 8
Mechanical Data ............................................................ 10
Safety and Installation Instructions ............................... 11
Description ...................................................................... 1
Functional Description .................................................... 2
Model Selection ............................................................... 2
Mains Input Section ......................................................... 4
Output Section ................................................................. 5
Copyright © 2015, Bel Power Solutions Inc. All rights reserved.
MELCHER
BCD.00617 Rev AB,16-Nov-2015
The Power Partners.
Page 1 of 15
Accessories Data Sheet
Backplanes BPD, BPF for T Series
Model Selection
Table 1: Type survey
AC Input
85...255 VAC
1 or 3 phase (Y)
BPD1002
BPD1003
BPF1004x
BPF1007x
BPF1006x
19” Rack, 3 U
1
2
3
Input filters
1
Output capacitors
(reduced 100 Hz
output ripple)
2
–
90 mF
x
x
x
Preload
Application
x
x
–
50 mF
90 mF
–
–
Front-end, fitted with diodes
Battery charger, fitted with fuses
Rack for systems with up to 3 T units
See also:
Electromagnetic Compatibility.
Please refer to:
Dimensioning Example of a Battery Charger System in Single Phase Connection
Only for LT units and 120/208 VAC. See fig.:
Mains input arrangement.
Functional Description
The back plane is divided into 3 sections, each one fitted with
an H15 female connector for one T unit, with the mains input
section and the DC output section separated from each other.
The layout of the standard back planes gives the user the
flexibility to operate the system either in single phase or
in 3-phase (Y) configuration. Connection to the mains is
achieved via the 6-pole connector (X1). With the wire jumpers
B10/20/30 in Y-position (standard configuration) each T unit is
connected between its defined input line and the neutral.
(Changing of the configuration by the customer is not
recommended.) An input filter, provided in the supply line to
each T unit minimizes the conducted noise at the input of the
system. The positive output of each T unit is separately fed to
the common power bus and is decoupled depending upon
the back plane type, either by a fuse (F11/21/31) or by a
decoupling diode (D11/21/31). The fuses (cartridge type) are
externally accessible from the frontside. The BPF versions are
fitted with a common preload (R25). Additional output
capacitors (up to 3 per output,10 mF each) further reduce the
low frequency output ripple and provide enhanced hold-up
time.
All relevant monitoring signals as well as control signal inputs
and outputs are accessible at the signal terminal strip (X5).
The jumper strip (X3) allows system specific signals accord-
ing to different jumper settings. An auxilliary circuit
(protected by a fuse F1, rated T1A, 250 V, 5
×
20 mm) allows a
relay to be directly driven for system specific control functions.
Each T unit provides an individually adjustable power down
signal enabling bus status monitoring at different voltage
levels. The threshold values can be set at the soldering tabs
D
set
(R13/14, R23/24 and R33/34).
Note:
If a power system is operated with 3 T units per back-
plane, connection to the mains in a 3-phase configuration (Y or
D) will provide equal load distribution on the input lines. Fur-
thermore the low frequency ripple at the output of the T units is
compensated to zero as long as all 3 T units are in operation.
MELCHER
BCD.00617 Rev AB,16-Nov-2015
The Power Partners.
Page 2 of 15
Accessories Data Sheet
Backplanes BPD, BPF for T Series
Signal terminal strip X5
Fuse F1(auxiliary circuit)
Connector H15 for T unit
X4
3
Input filter
Y
B30
+
D31
D21
D11
2
Input filter
Y
B20
Y
B10
1
Input filter
Mains input connector X1
L1
L2
L3
N
03012
F31
–
R33
R34
R23
R24
F21
R25
R13
R14
F11
Jumper strip X3
Bus bar system
Output capacitor (10 mF, each)
Preload (<10 W)
D
set
T1
Output fuse Decoupling
diode
Fig. 1
Back plane, view from the rear
T unit 1
B10
F
Y
P
N
Vo+
Vo–
Vo+ (BUS)
F11
R14
R13
D1
Sys In 1
Vo+ (BUS)
F21
R24
R23
D2
Sys In 2
Vo+ (BUS)
F31
R34
R33
D3
Sys In 3
C
+
+
C C
+
C
+
+
C C
+
C
+
+
C C
+
D11
03013
X1
L1
L2
L3
N
Y
B20
F
D set
D
i
Sys out
Sys In
RPT
DC-Bus
D21
R25
RPT
Vo–
D31
Vo+
T unit 2
P
N
Vo+
Vo–
D set
D
i
Sys out
Sys In
+
+
–
–
B30
F
Y
T unit 3
P
N
Vo+
Vo–
D set
D
i
Sys out
Sys In
RPT
Fig. 2
Block diagram of back plane
F11, 21, 31 fitted to BPF types. D11, 21, 31 fitted to BPD types.
MELCHER
BCD.00617 Rev AB,16-Nov-2015
The Power Partners.
Page 3 of 15
Accessories Data Sheet
Backplanes BPD, BPF for T Series
Mains Input Section
Connection to the Mains
Connection to the mains shall be made via the 6-pole screw
terminal connector (X1), located on the right hand side of the
back plane (view from the rear).
Table 2: Mains input arrangement
Mains voltage
Phase-Earth/Phase-Phase
230/400 V
120/208 V
Single phase
L, N,
LT models
(LT models)
UT models
3-phase (Y)
L1, L2, L3, N,
LT models
LT models
UT models
Phase - phase (
∆
)
L1, L2,
Not allowed
LT models only
External fuses required
3-phase (
∆
)
L1, L2, L3,
Not allowed
With special back plane
BPF 1037 and
LT models only
For single phase operation the terminals (L1, L2 and L3) at
the female connector X1 should be connected together. The T
Series has two AC input voltage ranges. The LT units are
optimized for the 230 V mains, the UT units for the
120 V mains; see also
the T Series data sheet on our website.
Single-phase/3-phase (Y) Configuration
Standard back plane version (Y-configuration)
The layout of the standard back planes allows operation of the
system either in single phase or in 3-phase (Y) configuration.
In both configurations each T unit on the back plane is
connected between its defined phase and neutral. For single
phase operation the AC-input terminals (L1, L2 and L3)
should be connected together at the female connector. Con-
nections to neutral and to ground are mandatory. (See also
fig.:
Single phase configuration
as well as fig.:
3-phase (Y)
configuration.)
Equal load distribution on the input lines at 3-
phase configuration will compensate the low frequency ripple
at the output to zero.
04017
X1
L1
L2
L3
Y
LT
1
Y
LT
2
Y
LT
3
N
N
L
Phase to Phase Configuration
With standard back plane version (Y-configuration)
For LT models exclusively
The layout of the standard back planes also allows phase to
phase connection at low mains voltage 208 V, e.g. USA, pro-
viding full output power from the LT units. In such cases one of
the two input lines (L1 or L2) should be connected to the N-
terminal at the AC input connector instead of the neutral line.
The neutral line is not connected. For safety reasons an
external fuse should be fitted in each input line. Connection to
the ground is mandatory.
X1
L1
L2
L3
Y
LT
1
Y
LT
2
Y
LT
3
N
L2
04019
L1
Fig. 3
Single phase configuration L, N
230 VAC: LT models
120 VAC: UT models, LT models
1
L1
L2
L3
Y
Y
Y
N
Fig. 5
X1
04018
Phase to phase configuration L1, L2
120/208 VAC (e.g. USA): LT models only.
Not applicable for UT models.
L1
L2
L3
N
LT/UT LT/UT LT/UT
3
2
1
Fig. 4
3-phase (Y) configuration L1, L2, L3, N
230/400 VAC:
120/208 VAC:
1
LT models
UT models, LT models
1
Reduced output power with LT models
MELCHER
BCD.00617 Rev AB,16-Nov-2015
The Power Partners.
Page 4 of 15
Accessories Data Sheet
Backplanes BPD, BPF for T Series
3-phase (∆) Configuration
∆
With special back plane version BPF 1037 (∆-configuration)
for LT units exclusively
Low mains 120/208 VAC
The input section of the 3 LT units is wired in a
∆-connection
enabling full output power of the LT units at low mains input
voltage 120/208 VAC.
Back planes in 3-phase (∆) configuration are available on
request. Modifications to the back plane in the field from "Y" to
∆-configuration
(and vice versa) are not recommended.
Maximum nominal input voltage: 230 VAC + 10%, phase to
phase. Higher input voltages may damage the LTs as well as
the back plane. Connection to the mains should strictly be
done according to fig.:
3-phase (∆) configuration.
Wrong
connection at the input may damage the LT converters as well
as the back plane. An external fuse needs to be installed into
each input line.
∆
∆
∆
X1
L1
L2
L3
N
04020
L1
L2
L3
LT
1
LT
2
LT
3
Fig. 6
3-phase (∆ ) configuration, L1, L2, L3
120/208 VAC (e.g. USA) LT models only.
Not applicable for UT models.
Output Section
Power Bus
The back plane is fitted with a generously dimensioned bus
bar system. Each bus bar (4 mm thick Aluminum alloy profile,
identified with its polarity) is fitted with 2 captive nuts (M 6)
serving as connection points to the load as well as to the
battery system. Depending upon the application either the
positive or the negative pole of the battery may be earthed.
For application specific requirements such as reduced ripple
current, reduced low frequency ripple voltage, enhan-ced
hold-up time or heavy pulse loads, the back planes are
available with additional output capacitors (see table:
Type
Sur vey).
The output capacitors are mounted between the
positive and the negative bus rails.
case of a short circuit across the output of one of the T units
the relevant fuse will blow, interrupting the reverse short circuit
current supplied by the battery and the remaining T units.
Power Down Signal
(D1, D2, D3)
The power down signal monitors the voltage level of the bus
bar system. Depending upon the application it may be advan-
tageous to use the power down signal D1 and D2 in a
redundant configuration and the third signal (D3) as a
separate warning signal at a higher threshold level. For such
a configuration the jumpers of X3 should be set in the posi-
tions
ΣD
- D1 and
ΣD
- D2. (See fig.
Jumper strip (X3), Signal
meshing.)
For individual adjustment of the power down level see also:
System Integration.
Inhibit
The output of a T unit may be enabled or disabled by the inhibit
input signal. Moreover the output voltage can be controlled
with an external temperature sensor connected to this input. If
just the inhibit function is used, the units can be individually
inhibited. If the output voltage is temperature controlled the
same sensor signal should control all units in the rack and the
jumpers of X3 should be set in all 3 inhibit positions,
Σi
– i1,
Σi
– i2, and
Σi
– i3 (See fig.
Jumper strip (X3), Signal meshing).
Front- End Version
To provide maximum system reliability especially with n+1 re-
dundant systems, each positive output path is fitted with a
decoupling diode mounted onto the positive bus rail. The
diodes D11, D21, and D31 prevent a possible Power Down on
the power bus in the case of a short-circuit across the output of
one of the T units. To maintain the signalling functions of the
T unit(s) in the case of a single inhibit or a single mains phase
failure, a PTC in parallel to the decoupling diode allows a
small reverse current from the DC bus supplying the control
functions of the affected T unit.
System Good Signal
(Sys In 1, 2, 3/Sys Out 1, 2, 3)
The System Good signal can be used either for status moni-
toring of each individual T unit or as a combined signal for
status monitoring of the whole system. For overall system
status monitoring jumpers should be set in the positions Si1-
So2, Si2 – So3 (See fig.
Jumper strip (X3), Signal meshing).
The System Good input of the first T unit in a system (T3)
should be referenced to the negative output. This can be done
either on the jumper strip X3 with a jumper in position
⊥-Si3
(See fig.
Jumper strip (X3), Signal meshing.)
or directly at the
terminal strip X5, by connecting Sys In 3 to Vo–. (See also:
System Integration.)
Battery Charger Version
Direct battery charging or powering battery buffered systems
require an adequate float charge voltage over the specified
temperature range. Decoupling diodes should be avoided
due to their voltage drop, affecting the float charge voltage of
the battery. To maintain system redundancy adequatedly rated
fuses (F11, F21 and F31, rated F20A minimum, 250 V, 6.3 – 32
mm each) are mounted in each positive output line. In the
MELCHER
BCD.00617 Rev AB,16-Nov-2015
The Power Partners.
Page 5 of 15
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