Basler BE1-50/51M-100 Series - Time Characteristics

BE1-50/51M General Information 1-9
T
AD
MC
BD K
T
N
=
-
++
Figure 1-5. Instantaneous Characteristic Curves
INST Characteristics
- Continued
On 100 series relays, additional delays of 0.1, 0.2, or 0.3 seconds may be
added with internal switches SW3-2 and -3. These delays apply to both
phase and ground applications. Closing switch SW3-2 provides an
additional delay of 0.1 second. Closing switch SW3-3 provides an
additional delay of 0.2 second. Closing both switches SW3-2 and -3
provides an additional delay of 0.3 second. Section 2 illustrates the
location of SW3.
On 200 series relays, an additional delay of 0.1 second may be added with
internal switch SW3-2. This delay applies to both phase and ground
applications. Closing switch SW3-2 provides the additional delay of 0.1
second.
Time Characteristics
Nine inverse time functions and one fixed time function can be selected by
a front panel switch. Characteristic curves for the inverse and definite time
functions are defined by the following equation.
Where:
D
= TIME DIAL setting
M
= Multiple of PICKUP
A, B, C, N, K
= Constants for the particular curve
Courtesy of NationalSwitchgear.com