Fuses
Inline fuses are used on both the positive and negative connections and are sized according to the
Stack Switchgear variant. See
for the fuse ratings for each Stack Switchgear variant.
The fuses interrupt a short circuit event; two of them are used to provide redundancy and to permit
use of the Stack Switchgear with an ungrounded battery stack. A microswitch is used on each fuse so
that the BMS can recognize blown fuses and issue a fault alert.
Table 2. Internal fuse ratings
Stack Switchgear Variant
Fuse Rating
Interrupt Current Rating
1250 V DC, 100 A
200 A
100 kA
1250 V DC, 200 A
315 A
100 kA
1250 V DC, 300 A
450 A
100 kA
Safety Relay (for E-Stop)
The Stack Switchgear has an internal safety relay for monitoring an external E-Stop signal. A safety
relay is used to ensure the relay cannot fail shorted.
This relay meets the requirements of the following standards: EN 954-1, EN 60204-1, VDE 0113-1
and IEC 60204-1. It also has approvals from UL, cUL, CCC and TUV. For more information about the
E-Stop functionality, see
.
2.1.3. External Interfaces
The Nuvation Energy Stack Switchgear provides the following external interfaces:
▪
Ethernet
▪
Link Bus
▪
Internal Power
▪
E-Stop
▪
Fan Control
▪
Battery Stack and DC Bus
▪
Grounding Stud
The following subsections describe each interface in more detail.
Ethernet
The Ethernet connector is a standard RJ45 Ethernet jack. Connect external equipment (such as a
network switch or a Nuvation Energy Battery Control Panel) to this connector.
Table 3. Ethernet Connector Pin Assignment
Nuvation Energy Stack Switchgear - Product Manual
Document ID: NE-PM-003
16
Rev 1.0, 2020-09-03
