Torque specifications
| Torque specifications | |
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Bolt Size M8 |
| 13.5 Nm |
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Bolt Size M10 |
| 30 Nm |
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Bolt Size M12 |
| 50 Nm |
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Bolt Size M14 |
| 75 Nm |
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Required Breaker Settings (400 V Systems)
Note: Contact APC Application Team for Required Breaker Settings in 380 V and 415 V systems.
The Symmetra® MW is a
A proper breaker coordination study is required to ensure the highest availability of the UPS. This breaker coordination study should be performed focusing on maintaining the fault tolerant characteristics of the Symmetra MW.
The following tables provide the optimum settings for the input and output breakers. The settings are specified in the tables below, but some of them can also be found in the Electrical Specification section.
See separate manual on parallel operation for information on required breaker settings in parallel systems.
Input and upstream breakers
Q1, Q5, and any upstream breaker
Duration [S] | Current [A] | Total load [%] | Event/Operation |
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< 0.005 | 22 kA | Internal fault clearing | |
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∞ | 2200* | 127 | Overload |
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∞ | 1793 | 100 | |
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∞ | 1972 | 110 | |
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| charge |
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* In the absence if a coordination study conducted by a professional engineer, the recommended
instantaneous trip setting for breakers Q1, Q2, Q4, Q5, and Q6 is 22 kA
** Only applicable to Q1
20 | Symmetra MW II 1200 kW 3 x 400/230 V Installation - |