Response time of the shunt trip and shunt close for the Shunt Trip fused load break switch 4.76–38 kV, 600 A

[al1986]

What is the response time of the shunt trip and shunt close or the Shunt Trip fused load break switch 4.76–38 kV, 600 A. 

Which one provide a faster response to clear fault or shunt trip, a shunt trip installed on a MV fused load break switch, or a shunt trip installed on a vacuum MV circuit breaker?