MicroHarmony Cell Sizes 40 - 260A Manual
Cell Control Board - 10000432
19001467: Version 1.0
5-5
s
5
5.5 Protection Features
The Cell Control Board (CCB) contains circuitry and firmware that protects the cell from various abnormal operating
conditions. A description of these protection functions as well as the resulting cell response and the detection
thresholds are described below:
Cell Protection
CCB Board
Ref. Signal
Description and Thresholds
Over Voltage
1
VDCHIL
DC voltage between Plus-Minus bus has exceeded the upper limit of its
allowable range. This is set by a solder blob (SB) jumper on the CCB.
VDCHIL is active low when Vbus exceeds:
630V: 1096
±
30 vdc
690V: 1200
±
30 vdc
750V: 1300
±
30vdc
Under Voltage
1
VDCLOWL
DC voltage between Plus-Minus bus has decreased below the lower limit
of its allowable range. VDCLOWL is active low when Vbus drops below
475
±
24vdc
Control Power
Fault
1
POWEROK
DC voltage between Plus-Minus bus is valid for control circuits. This does
not necessarily mean that DC power is available for driving load.
POWEROK is active high when Vbus exceeds 300
±
30vdc
Cap-Share Fault
1
VCAPOK
Voltage across power capacitors is all less than specified upper limit. This
is set by scaling resistors for either 400 or 450V capacitors. VCAPOK is
active high when individual capacitor voltages are less than:
400V: 430
±
10vdc
450V: 485
±
10vdc
Out of Saturation
1
OOS1L to
OOS4L
Voltage between collector and emitter of an IGBT has exceeded its upper
limit due to de-saturation with gate signal applied. This implies the IGBT
may have encountered a short circuit condition. OOS1L to OOS4L are
active low.
Cell Over
Temperature
2
OVERTMP
A PTC thermistor on the heat sink is used to monitor the critical tempera-
ture between the IGBTs. Circuits on the CCB modulate the signal from this
thermistor to a PWM weighted bit, which is transmitted by the CCB on
every down packet. Refer to “Heat Sink Temperature Monitor”
section for more details. Trips at ~80°C.
Device Failure
3
Q1BLK to
Q4BLK
If collector-emitter of IGBT fails to block minimum voltage threshold
while gate signal is not applied, then QnBLK becomes low; “n” is 1 to 4
indicating effected IGBT.
Input Power Low
2
VAVLOW
VAVLOW becomes active high when AC input voltage drops below
470
±
40Vrms. This is the allowable minimum input voltage.
Summary of Contents for Eupec
Page 16: ...Cell Overview MicroHarmony Cell Sizes 40 260A Manual 1 6 19001467 Version 1 0 s 1 ...
Page 36: ...Installation MicroHarmony Cell Sizes 40 260A Manual 3 4 19001467 Version 1 0 s 3 ...
Page 42: ...Electrical Description MicroHarmony Cell Sizes 40 260A Manual 4 6 19001467 Version 1 0 s 4 ...
Page 56: ...Repair Hints MicroHarmony Cell Sizes 40 260A Manual 8 4 19001467 Version 1 0 s 8 ...
Page 76: ...Drive Calc Express MicroHarmony Cell Sizes 40 260A Manual 10 2 19001467 Version 1 0 s 10 ...
Page 86: ...Communication Protocol MicroHarmony Cell Sizes 40 260A Manual 11 10 19001467 Version 1 0 s 11 ...
Page 87: ...MicroHarmony Cell Sizes 40 260A Manual NOTES 19001467 Version 1 0 N 1 s NOTES ...
Page 88: ...NOTES MicroHarmony Cell Sizes 40 260A Manual N 2 19001467 Version 1 0 s ...
Page 89: ...MicroHarmony Cell Sizes 40 260A Manual NOTES 19001467 Version 1 0 N 3 s ...
Page 90: ...NOTES MicroHarmony Cell Sizes 40 260A Manual N 4 19001467 Version 1 0 s ...