Protection Specifications
HELIOS ESS Protection Specifications
Specification | 52-48-16000 | 900-0077 |
|---|---|
Overvoltage | |
Protection (a) | Above 58.08 V for 3 seconds |
Recovery (a) | Recovery after 120 seconds and less than 55.2 V |
Undervoltage | |
Protection (b) | Less than 43.2 V for 5 seconds |
Recovery (b) | No automatic recovery. The battery shuts down after 120 seconds. |
Over-Charge Current | |
Protection | Greater than 200 A for 10 seconds |
Recovery | Remove source. Recovery after 120 seconds |
Over-Discharge Current | |
Protection (c) | Greater than 200 A for 15 seconds |
Recovery (c) | Remove load. Recovery after 120 seconds |
Over-temperature in Charge | |
Protection (d) | Cell temperature above 55°C (131°F) for 5 seconds |
Recovery (d) | Cell temperature below 51°C (123.8°F) |
Under-temperature in Charge | |
Protection (d) | Cell temperature below 4°C (39.2°F) for 5 seconds and charge current detected. |
Recovery (d) | Recovery after 120 seconds and cell temperature 4°C (39.2°F) or higher. |
Over-temperature in Discharge | |
Protection (d) | Cell temperature above 55°C (131°F) for 5 seconds |
Recovery (d) | Cell temperature below 51°C (123.8°F) |
Under-temperature in Discharge | |
Protection (d) | Cell temperature below -25°C (-13°F) for 5 seconds |
Recovery (d) | Cell temperature above -23°C (-9.4°F) |
Load Qualification Protection | |
Protection | Mixed System Voltage, Short Circuit, Reverse Polarity, Input Capacitance Overload |
Recovery | Re-qualify after 120 seconds. After ten failed attempts to qualify, the battery switches OFF. |
(a) Overvoltage protection monitors individual cell voltages. Protection is triggered when any cell is over 3.63 VPC and recovers when all cells are below 3.45 VPC for 120 seconds. Voltages are provided for guidance only.
(b) Undervoltage protection monitors the voltage of individual cells. Protection is triggered, and the battery is set to OFF when any cell is at or below 2.7 VPC. Manually set the battery ON to recover. Voltages are provided for guidance only.
(c) For time versus current interrupt details, refer to the figure below.
(d) Specifies the temperature of the cells and not the ambient temperature. Ambient temperature and cell temperature may not be the same.
Breaker Delay Specifications
Breaker Delay
Rating (%) | Current | Delay Time (seconds) (a) |
|---|---|---|
100 | 200 A | Breaker should not trip |
100 - 125 | 200 - 250 A | Breaker may trip |
150 | 300 A | 18 |
200 | 400 A | 8 |
300 | 600 A | 2.8 |
500 | 1000 A | 0.57 |
800 | 1600 A | 0.007 |
(a) The delay time is approximate due to the breaker tolerance range.