SIM100MLP datasheet(6/19 Pages) SENSATA

6 / 19 page

Preliminary

Rev 1.1a

Sendyne SIM100MLP

Sendyne’s patented and patent pending method for

monitoring the isolation state of the IT power system

provides unique features not available in other com-

mercial devices. Specifically, the SIM100 is capable of

estimating accurately the state of the isolation system

when the load is active and the battery voltage is

continuously varying. This unique feature, while im-

portant for the safety of every IT electrical system, is

especially important for the safety of systems that are

engaged in commercial activities with very little down

time, such as commercial vehicles and equipment.

In addition, the SIM100 is the only product in the

market today that provides estimates for the isola-

tion system capacitances. Besides the added safety

provided by estimating the energy stored in them,

capacitances estimation is necessary to be able to

analyze the isolation system behavior dynamically and

during transitions. Sendyne utilizes state-of-the-art

stochastic filtering and numerical methods to evalu-

ate the isolation state dynamically and accurately.

The SIM100 provides individual estimates for each

isolation resistance and capacitance along with the

uncertainty in their calculation. Typical accuracy of

SIM100’s estimates is better than ±5%.

Chassis

+ -

ΔV

Figure 6: Sendyne’s SIM100 estimates dynamically

the isolation state taking into consideration the vary-

ing battery voltage and the Y-capacitances.

SIM100 response time

The SIM100 refreshes its estimates every 500 ms.

Slow changes in the system isolation state can be

tracked and updated within this interval. For large

changes, such as the ones described in the UL 2231

tests, the response time of the SIM100 is less than 5 s.

BAT

CH1

CH2

F,N

200∙V

BAT

100∙V

BAT

VX1

VX2

SIM100

Figure 7: Circuit for testing SIM100 response time

and accuracy in the successive insertion of a 200

Ohm/V and 100 Ohm/V resistor (R

F,N)

+15%

-15%

100*V

BATT

200*V

BATT

200*V

BATT

< 5 s

100*V

BATT

100

110

120

-60

-40

-20

Time (s)

Estimates of R

F,N in 10 experiments & response times (25

Figure 8: Estimates of R

F,N provided in 10 successive

experiments at room temperature. The green line

represents the actual value of the inserted resistor.

Greyed areas show UL2231-2 accuracy require-

ments.

As can be seen in Figure 8, SIM100 provides stable

and accurate results within 5 sec of the transition.

Response time is well below the 10 s requirement by

different standards. Subsequent estimates are updated

every 500 ms. In the same chart, highlighted in grey,

are the ±15% accuracy levels specified by UL 2231-1

and -2. SIM100 estimate errors are below ±3%.

SIM100 performance

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